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Publisher: Elsevier   (Total: 3031 journals)

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Showing 1 - 200 of 3031 Journals sorted alphabetically
AASRI Procedia     Open Access   (Followers: 15)
Academic Pediatrics     Hybrid Journal   (Followers: 20, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 16, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 79, SJR: 1.109, h-index: 94)
Accounting Forum     Hybrid Journal   (Followers: 22, SJR: 0.612, h-index: 27)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 27, SJR: 2.515, h-index: 90)
Achievements in the Life Sciences     Open Access   (Followers: 4)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 5, SJR: 0.338, h-index: 19)
Acta Astronautica     Hybrid Journal   (Followers: 303, SJR: 0.726, h-index: 43)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 3)
Acta Biomaterialia     Hybrid Journal   (Followers: 25, SJR: 2.02, h-index: 104)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription  
Acta de Investigación Psicológica     Open Access   (Followers: 2)
Acta Ecologica Sinica     Open Access   (Followers: 8, SJR: 0.172, h-index: 29)
Acta Haematologica Polonica     Free   (SJR: 0.123, h-index: 8)
Acta Histochemica     Hybrid Journal   (Followers: 3, SJR: 0.604, h-index: 38)
Acta Materialia     Hybrid Journal   (Followers: 196, SJR: 3.683, h-index: 202)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.615, h-index: 21)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.442, h-index: 21)
Acta Oecologica     Hybrid Journal   (Followers: 9, SJR: 0.915, h-index: 53)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription   (Followers: 1)
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 3, SJR: 0.311, h-index: 16)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 2)
Acta Poética     Open Access   (Followers: 4)
Acta Psychologica     Hybrid Journal   (Followers: 21, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 5, SJR: 1.059, h-index: 77)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 4)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 3)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 3, SJR: 0.383, h-index: 19)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 2)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 5, SJR: 0.141, h-index: 3)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 4, SJR: 0.112, h-index: 2)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 4)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.967, h-index: 57)
Addictive Behaviors     Hybrid Journal   (Followers: 15, SJR: 1.514, h-index: 92)
Addictive Behaviors Reports     Open Access   (Followers: 5)
Additive Manufacturing     Hybrid Journal   (Followers: 7, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 119, SJR: 5.2, h-index: 222)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 11, SJR: 1.265, h-index: 53)
Advanced Powder Technology     Hybrid Journal   (Followers: 16, SJR: 0.739, h-index: 33)
Advances in Accounting     Hybrid Journal   (Followers: 8, SJR: 0.299, h-index: 15)
Advances in Agronomy     Full-text available via subscription   (Followers: 15, SJR: 2.071, h-index: 82)
Advances in Anesthesia     Full-text available via subscription   (Followers: 24, SJR: 0.169, h-index: 4)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 3)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 6, SJR: 1.054, h-index: 35)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 10, SJR: 0.801, h-index: 26)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 21, SJR: 1.286, h-index: 49)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 16, SJR: 3.31, h-index: 42)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.277, h-index: 43)
Advances in Botanical Research     Full-text available via subscription   (Followers: 3, SJR: 0.619, h-index: 48)
Advances in Cancer Research     Full-text available via subscription   (Followers: 26, SJR: 2.215, h-index: 78)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 9, SJR: 0.9, h-index: 30)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 2.139, h-index: 42)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24, SJR: 0.183, h-index: 23)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 10, SJR: 0.665, h-index: 29)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 8, SJR: 1.268, h-index: 45)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 28, SJR: 0.938, h-index: 33)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18, SJR: 2.314, h-index: 130)
Advances in Computers     Full-text available via subscription   (Followers: 16, SJR: 0.223, h-index: 22)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in Digestive Medicine     Open Access   (Followers: 4)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Ecological Research     Full-text available via subscription   (Followers: 39, SJR: 3.25, h-index: 43)
Advances in Engineering Software     Hybrid Journal   (Followers: 25, SJR: 0.486, h-index: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 38, SJR: 5.465, h-index: 64)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 41, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Genetics     Full-text available via subscription   (Followers: 15, SJR: 2.558, h-index: 54)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in Geophysics     Full-text available via subscription   (Followers: 6, SJR: 2.325, h-index: 20)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 18, SJR: 0.906, h-index: 24)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 0.497, h-index: 31)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2, SJR: 0.396, h-index: 27)
Advances in Immunology     Full-text available via subscription   (Followers: 33, SJR: 4.152, h-index: 85)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 1.132, h-index: 42)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 3, SJR: 1.274, h-index: 27)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 4)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 4)
Advances in Life Course Research     Hybrid Journal   (Followers: 7, SJR: 0.764, h-index: 15)
Advances in Lipobiology     Full-text available via subscription   (Followers: 1)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16, SJR: 1.645, h-index: 45)
Advances in Mathematics     Full-text available via subscription   (Followers: 10, SJR: 3.261, h-index: 65)
Advances in Medical Sciences     Hybrid Journal   (Followers: 5, SJR: 0.489, h-index: 25)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 4, SJR: 1.44, h-index: 51)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 21)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 10)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 6, SJR: 0.324, h-index: 8)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 3)
Advances in Oncobiology     Full-text available via subscription   (Followers: 3)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15, SJR: 2.885, h-index: 45)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7, SJR: 0.148, h-index: 11)
Advances in Parasitology     Full-text available via subscription   (Followers: 7, SJR: 2.37, h-index: 73)
Advances in Pediatrics     Full-text available via subscription   (Followers: 20, SJR: 0.4, h-index: 28)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 14)
Advances in Pharmacology     Full-text available via subscription   (Followers: 13, SJR: 1.718, h-index: 58)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 7, SJR: 0.384, h-index: 26)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.248, h-index: 11)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 8)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 5)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 17, SJR: 1.5, h-index: 62)
Advances in Psychology     Full-text available via subscription   (Followers: 56)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5, SJR: 0.478, h-index: 32)
Advances in Radiation Oncology     Open Access  
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 1, SJR: 0.1, h-index: 2)
Advances in Space Research     Full-text available via subscription   (Followers: 332, SJR: 0.606, h-index: 65)
Advances in Structural Biology     Full-text available via subscription   (Followers: 7)
Advances in Surgery     Full-text available via subscription   (Followers: 6, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 28, SJR: 1.321, h-index: 56)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 14)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 12)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 1.878, h-index: 68)
Advances in Water Resources     Hybrid Journal   (Followers: 42, SJR: 2.408, h-index: 94)
Aeolian Research     Hybrid Journal   (Followers: 5, SJR: 0.973, h-index: 22)
Aerospace Science and Technology     Hybrid Journal   (Followers: 303, SJR: 0.816, h-index: 49)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.318, h-index: 36)
African J. of Emergency Medicine     Open Access   (Followers: 4, SJR: 0.344, h-index: 6)
Ageing Research Reviews     Hybrid Journal   (Followers: 7, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 388, SJR: 1.385, h-index: 72)
Agri Gene     Hybrid Journal  
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 15, SJR: 2.18, h-index: 116)
Agricultural Systems     Hybrid Journal   (Followers: 29, SJR: 1.275, h-index: 74)
Agricultural Water Management     Hybrid Journal   (Followers: 36, SJR: 1.546, h-index: 79)
Agriculture and Agricultural Science Procedia     Open Access  
Agriculture and Natural Resources     Open Access   (Followers: 1)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 48, SJR: 1.879, h-index: 120)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.434, h-index: 14)
Air Medical J.     Hybrid Journal   (Followers: 3, SJR: 0.234, h-index: 18)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.285, h-index: 3)
Alcohol     Hybrid Journal   (Followers: 9, SJR: 0.922, h-index: 66)
Alcoholism and Drug Addiction     Open Access   (Followers: 5)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 1, SJR: 0.436, h-index: 12)
Alexandria J. of Medicine     Open Access  
Algal Research     Partially Free   (Followers: 7, SJR: 2.05, h-index: 20)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.46, h-index: 29)
Allergology Intl.     Open Access   (Followers: 5, SJR: 0.776, h-index: 35)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 6, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 45, SJR: 4.289, h-index: 64)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 5)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 3)
American Heart J.     Hybrid Journal   (Followers: 45, SJR: 3.157, h-index: 153)
American J. of Cardiology     Hybrid Journal   (Followers: 47, SJR: 2.063, h-index: 186)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 34, SJR: 0.574, h-index: 65)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 6, SJR: 1.091, h-index: 45)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 14, SJR: 1.653, h-index: 93)
American J. of Human Genetics     Hybrid Journal   (Followers: 32, SJR: 8.769, h-index: 256)
American J. of Infection Control     Hybrid Journal   (Followers: 25, SJR: 1.259, h-index: 81)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 31, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 48, SJR: 2.023, h-index: 189)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 173, SJR: 2.255, h-index: 171)
American J. of Ophthalmology     Hybrid Journal   (Followers: 51, SJR: 2.803, h-index: 148)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 2)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.249, h-index: 88)
American J. of Otolaryngology     Hybrid Journal   (Followers: 22, SJR: 0.59, h-index: 45)
American J. of Pathology     Hybrid Journal   (Followers: 23, SJR: 2.653, h-index: 228)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 21, SJR: 2.764, h-index: 154)
American J. of Surgery     Hybrid Journal   (Followers: 32, SJR: 1.286, h-index: 125)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 13, SJR: 0.653, h-index: 70)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 5)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.066, h-index: 51)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 52, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 3)
Anales de Cirugia Vascular     Full-text available via subscription  
Anales de Pediatría     Full-text available via subscription   (Followers: 2, SJR: 0.209, h-index: 27)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription   (SJR: 0.104, h-index: 3)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 2, SJR: 2.577, h-index: 7)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38, SJR: 1.548, h-index: 152)
Analytical Biochemistry     Hybrid Journal   (Followers: 151, SJR: 0.725, h-index: 154)
Analytical Chemistry Research     Open Access   (Followers: 7, SJR: 0.18, h-index: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 10)
Anesthésie & Réanimation     Full-text available via subscription  
Anesthesiology Clinics     Full-text available via subscription   (Followers: 21, SJR: 0.421, h-index: 40)
Angiología     Full-text available via subscription   (SJR: 0.124, h-index: 9)
Angiologia e Cirurgia Vascular     Open Access  
Animal Behaviour     Hybrid Journal   (Followers: 141, SJR: 1.907, h-index: 126)
Animal Feed Science and Technology     Hybrid Journal   (Followers: 5, SJR: 1.151, h-index: 83)
Animal Reproduction Science     Hybrid Journal   (Followers: 5, SJR: 0.711, h-index: 78)
Annales d'Endocrinologie     Full-text available via subscription   (SJR: 0.394, h-index: 30)
Annales d'Urologie     Full-text available via subscription  
Annales de Cardiologie et d'Angéiologie     Full-text available via subscription   (SJR: 0.177, h-index: 13)
Annales de Chirurgie de la Main et du Membre Supérieur     Full-text available via subscription  
Annales de Chirurgie Plastique Esthétique     Full-text available via subscription   (Followers: 2, SJR: 0.354, h-index: 22)
Annales de Chirurgie Vasculaire     Full-text available via subscription   (Followers: 1)

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Journal Cover Alexandria Engineering Journal
  [SJR: 0.436]   [H-I: 12]   [1 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 1110-0168
   Published by Elsevier Homepage  [3031 journals]
  • Reduction of source current harmonics in ANN controlled induction motor

    • Authors: A. Sivakumar; N.B. Muthu Selvan
      Abstract: Publication date: Available online 19 April 2017
      Source:Alexandria Engineering Journal
      Author(s): A. Sivakumar, N.B. Muthu Selvan
      Harmonics generated by the nonlinear loads is a serious concern to the power system engineers as it adversely affects the power quality of the system. Recently, many findings focus on reducing the harmonics by introducing various topologies of the filter at the load end. This paper introduces a new concept of reducing current harmonics at the source side of induction motor using SAF in ANN controller. The vector control approach has been adopted for improving the dynamic performance of three phase induction motors. The voltage source inverter fed induction motor is considered as a nonlinear load. The mathematical model of three phase induction motor has been developed and the source current harmonics is reduced using PI and ANN controller. The hardware implementation of induction motor drive with shunt active filter on the supply side has been done. Also, the model is simulated using MATLAB/Simulink software and validated with the hardware results.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.03.048
       
  • A novel hybrid intelligent system with missing value imputation for
           diabetes diagnosis

    • Authors: Rohollah Ramezani; Mansoureh Maadi; Seyedeh Malihe Khatami
      Abstract: Publication date: Available online 19 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Rohollah Ramezani, Mansoureh Maadi, Seyedeh Malihe Khatami
      Recently, diabetes becomes the widespread and major disease in the world. In this paper, we propose a novel hybrid classifier for diabetic diseases. The proposed hybrid classifier named Logistic Adaptive Network-based Fuzzy Inference System (LANFIS) is a combination of Logistic regression and Adaptive Network-based Fuzzy Inference System. Our proposed intelligent system does not use classifiers to continuous output, does not delete samples with missing values, and does not use insignificant attributes which reduces number of tests required during data acquisition. The diagnosis performance of the LANFIS intelligent system is calculated using sensitivity, specificity, accuracy and confusion matrix. Our findings show that the classification accuracy of LANFIS intelligent system is about 88.05%. Indeed, 3–5% increase in accuracy is obtained by the proposed intelligent system and it is better than fuzzy classifiers in the available literature by deleting all samples to missing values and applying traditional classifiers to different sets of features.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.03.043
       
  • Renewable energy technologies for sustainable development of energy
           efficient building

    • Authors: Arvind Chel; Geetanjali Kaushik
      Abstract: Publication date: Available online 19 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Arvind Chel, Geetanjali Kaushik
      The energy conservation through energy efficiency in the building has acquired prime importance all over the world. The four main aspects for energy efficiency in a building include first and foremost the nearly zero energy passive building design before actual construction, secondly the usage of low energy building materials during its construction, thirdly use of energy efficient equipments for low operational energy requirement and lastly integration of renewable energy technologies for various applications. These aspects have been discussed along with their economics and environmental impacts briefly in this paper. The first aspect is related to the prior design before construction of a solar passive building techniques adapted all over the world not only for passive heating/cooling but also for daylighting the building. Second is utilizing the low embodied energy building materials for building construction. The third aspect deals with the operational energy conservation using energy efficient equipments in the building. Lastly, the building has to include utility of integrated renewable systems for hot water heating, solar photovoltaic electrification, etc.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.02.027
       
  • Enhanced impact properties of cementitious composites reinforced with
           pultruded flax/polymeric matrix fabric

    • Authors: Magdi El-Messiry; Shaimaa El-Tarfawy; Rania El Deeb
      Abstract: Publication date: Available online 18 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Magdi El-Messiry, Shaimaa El-Tarfawy, Rania El Deeb
      Fiber reinforced concrete (FRC) has become increasingly applied in civil engineering in the last decades. Natural fiber fabric reinforced cement composites are considered to prevent damage resulting from an impact loading on the cementite plate. Flax woven fabric that has a high energy absorption capability was chosen. To increase the interfacial shear properties, the fabric was pultruded with different matrix properties that affect the strength and toughness of the pultruded fabric. In this study, three fabric structures are used to increase the anchoring of the cement in the fabric. The compressive strength and the impact energy were measured. The results revealed that pultruded fabric reinforced cement composite (PFRC) absorbs much more impact energy. PFRC under impact loading has more micro cracks, while plain cement specimen shows brittle failure. The compressive test results of PFRC indicate that flax fiber fabric polymer enhanced compressive strength remarkably. Fiber reinforcement is a very effective in improving the impact resistance of PFRC. The study defines the influence factors that control the energy dissipation of the composite, which are the hardness of the polymer and the fabric cover factor. Significant correlation between impact energy and compressive strength was proved.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.03.032
       
  • Implementation of artificial neural network based controller for a
           five-level converter based UPQC

    • Authors: Sudheer Vinnakoti; Venkata Reddy Kota
      Abstract: Publication date: Available online 18 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Sudheer Vinnakoti, Venkata Reddy Kota
      To reduce the cost and complexity of the system, ANN controller is proposed for a five-level converter based UPQC which eliminates mathematical operations such as a-b-c to d-q-0 transformation and complex controllers such as DSP’s and FPGA’s,. This paper proposes a five-level DCC based UPQC with ANN based controller and its performance is tested with nonlinear unbalanced loads and harmonic supply voltage. In addition, voltage related issues such as sag and swell are also considered. ANN control scheme trained with Levenberg-Marquardt backpropagation algorithm is used in this paper for effective generation of reference signals and also for maintaining desired dc link capacitor voltage. Simulations are carried out in Matlab/Simulink software with two-level UPQC, and three-level and five-level diode clamped converter based UPQC using SRF based control and ANN control schemes. The results showed better performance with the proposed concept and are discussed in this paper. The response of dc link capacitor voltage with two-level, three-level and five-level converter based UPQC and its effect on supply currents are discussed. Comparison of %THD in load voltage and supply current with two-level, three-level and five-level converter based UPQC using SRF based control and ANN control schemes is presented to show the superiority of the proposed controller.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.03.027
       
  • Calophyllum inophyllum methyl ester biodiesel blend as an alternate fuel
           for diesel engine applications

    • Authors: B. Ashok; K. Nanthagopal; D. Sakthi Vignesh
      Abstract: Publication date: Available online 18 April 2017
      Source:Alexandria Engineering Journal
      Author(s): B. Ashok, K. Nanthagopal, D. Sakthi Vignesh
      Calophyllum inophyllum oil is non-edible in nature could be used as a source for biodiesel esterification in India and it is also available in abundant quantities in places such as Southern east and East Asia and Australia. The present research work examines the suitability of Calophyllum inophyllum as promising feedstock for biodiesel production and its employability in diesel engine operation. The Calophyllum trees are found in abundance in India and can reduce the dependency of petroleum imports to a certain extent. The biodiesel Calophyllum inophyllum Methyl Ester (CIME100) and its blends CIME30 and CIME60 are used in engine testing. The experimental parameters such as brake thermal efficiency, brake specific energy consumption, unburned hydrocarbon, carbon monoxide, and NOx emissions are evaluated with CIME100 biodiesel and the results are compared with conventional fuel. It is observed that the CIME biodiesel resulted in slight decrease in brake thermal efficiency. The hydrocarbon and carbon monoxide emissions are reduced with the use of biodiesel with significant penalty in oxides of nitrogen emissions. In addition, the combustion parameters such as cylinder gas pressure, ignition delay period, and heat release rate of CIME100 are discussed in detailed and compared to conventional diesel fuel under various loading conditions.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.03.042
       
  • A computational modelling of micro strip patch antenna and its solution by
           RDTM

    • Authors: R.K. Chaurasia; Vishal Mathur; R.L. Pareekh; Mohammad Tamsir; Vineet K. Srivastava
      Abstract: Publication date: Available online 17 April 2017
      Source:Alexandria Engineering Journal
      Author(s): R.K. Chaurasia, Vishal Mathur, R.L. Pareekh, Mohammad Tamsir, Vineet K. Srivastava
      This paper concerns with the modelling of a micro strip antenna with strip line feeding technique formulated using Ohm’s law. A partial differential equation is obtained from the model which is solved using “Reduced Differential Transformation Method (RDTM)”. A couple of numerical examples are considered to check the accuracy, efficiency and convergence of the method. The present method is a very powerful mathematical tool for solving wide range of problems arising in circuit theory, RF field, and science and communication system fields.

      PubDate: 2017-04-19T23:01:26Z
      DOI: 10.1016/j.aej.2017.03.040
       
  • The space-splitting idea combined with local radial basis function
           meshless approach to simulate conservation laws equations

    • Authors: Mehdi Dehghan; Mostafa Abbaszadeh
      Abstract: Publication date: Available online 10 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Mehdi Dehghan, Mostafa Abbaszadeh
      One acceptable technique in meshfree methods is collocation procedure based on the radial basis functions. But the mentioned technique is poor for solving problems that have shock (advection problems). The use of local collocation radial basis function method overcomes this important issue. The interpolation matrix of local radial basis functions is well-posed. Also, it is better, for obtaining high-order accurate results, we consider many points in the domain; thus, the size of coefficient matrix will be large. We suggest a robust technique to deal with this matter. In the current paper, we combine the local collocation radial basis functions method with the space-splitting technique. Solving some one-dimensional problems instead of a two-dimensional problem is an important advantage of the presented combination. For showing the efficiency of new method, we solve some conservation laws equations. An important benefit of the meshless methods is applying them on irregular domains; thus, we provided a test problem that has been solved on two irregular geometries. We use the local RBF collocation method to discrete the spatial domain and then we obtain a nonlinear system of ODEs that it will be solved using the fourth-order exponential time differencing Runge–Kutta method. Moreover, several examples are given that show the acceptable accuracy and proficiency of the present scheme.

      PubDate: 2017-04-12T18:31:36Z
      DOI: 10.1016/j.aej.2017.02.024
       
  • Secure server-server communication for dual stage biometrics – based
           password authentication scheme

    • Authors: Mythili Boopathi; M. Aramudhan
      Abstract: Publication date: Available online 10 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Mythili Boopathi, M. Aramudhan
      The distributed environment insists the protection of servers, while information sharing is achieved. The conventional biometrics-based password authentication mechanisms use single server, which can be compromised easily. The dual stage authentication mechanism has been already proved for its security over the single stage authentication mechanism in our previous work. In this paper, the protocol is improved to establish communication between the authentication server and the master server through a secure link. Since the hashed messages are prone to collision attacks, the proposed scheme uses elliptic curve cryptography-based ciphers for establishing connection at the initial stage. The security analysis of the proposed authentication scheme with secure server – server communication link reveals the robustness and the security features, which are offered over our previous as well as the conventional authentication mechanisms.

      PubDate: 2017-04-12T18:31:36Z
      DOI: 10.1016/j.aej.2017.01.031
       
  • Dynamic operation rules of multi-purpose reservoir for better flood
           management

    • Authors: Ahmed Moustafa Ahmed Moussa
      Abstract: Publication date: Available online 10 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Ahmed Moustafa Ahmed Moussa
      This research was commenced to enhance flood management via improving the operation rules of multi-purpose reservoirs (i.e. Aswan High Dam Reservoir “AHDR”). Literature in the field of reservoir operation rules was reviewed. Available data, about Aswan High Dam (AHD) together with its reservoir releases, were assembled and analyzed. Accessible numerical models were investigated to select the applicable model in terms of the assembled available data. Tenth scenarios (the current scenario and 9 proposed scenarios) for AHDR operation rules were designed and simulated. These scenarios include climate change, static operation (fixed level at beginning of water year from the 1st of August) and dynamic operation. Results were obtained and compared to the existing operation rules. The comparison considered the storage, water release, hydropower generation and total losses. In addition, the comparison considered the dam safety. The comparison indicated that the dynamic operation rules would achieve satisfying results; this scenario will provided an increase in the yearly AHDR storage from 3% to 4% during 9years. The total increase in the storage was 22.46 BCM during 9years without any reduction in the release downstream AHD and the hydropower generation. This increase in storage can be used for Toshka project.

      PubDate: 2017-04-12T18:31:36Z
      DOI: 10.1016/j.aej.2017.03.012
       
  • Palm fibers and modified palm fibers adsorbents for different oils

    • Authors: Ola Abdelwahab; Samir M. Nasr; Walaa M. Thabet
      Abstract: Publication date: Available online 9 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Ola Abdelwahab, Samir M. Nasr, Walaa M. Thabet
      The cleanup of oil spill using natural adsorbents is considered as an eco-friendly and cost-effective way, emphasizing the importance of such natural and effective promising technique. Palm fibers, PFs, were used as natural sorbent material for oil spill removal. The present study examines the sorption efficiency and capacity of raw and modified fibers for three types of oil: diesel oil, crude oil and vegetable oil. The results revealed that the efficiency of fibers to remove different types of oil from artificial saline water was related to sorption time and the system conditions such as oil film thickness, particle size, sorbent dosage and temperature. The results showed high sorption efficiency and capacity of palm fibers for different kinds of oil. PFs were very proved to be promising fibers because of all advantages of agricultural wastes plus the high resistance of that fibers which appeared obviously in the present study.

      PubDate: 2017-04-12T18:31:36Z
      DOI: 10.1016/j.aej.2016.11.020
       
  • Inelastic performance of RC buildings subjected to near-source
           multi-component earthquakes

    • Authors: Laila Elhifnawy; Hamdy Abou-Elfath; Emad El-Hout
      Abstract: Publication date: Available online 8 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Laila Elhifnawy, Hamdy Abou-Elfath, Emad El-Hout
      The inelastic behavioral characteristics of three RC buildings having 6-, 10- and 20-stories under near-source multi-component earthquake excitations are investigated. Ten earthquake records are used in the analysis to cover a wide range of vertical to horizontal spectral ratios. The performances of the buildings are evaluated through the roof displacements, the maximum story drift ratios and the maximum axial forces and strain ductility factors in the building members. Four analysis cases are considered for each earthquake including, one lateral earthquake component (X-case), two lateral earthquake components (XY-case), one lateral earthquake component accompanied with the vertical earthquake component (XZ-case) and two lateral earthquake components accompanied with the vertical earthquake component (XYZ-case). The results obtained in this study indicate that the multi-component effect of the earthquakes has a considerable effect on the axial forces and strain ductility factors of the building columns although it does not significantly affect the building lateral-deformation response.

      PubDate: 2017-04-12T18:31:36Z
      DOI: 10.1016/j.aej.2017.03.023
       
  • Computational modeling of magnetohydrodynamic non-Newtonian fluid flow
           past a paraboloid of revolution

    • Authors: G. Kumaran; N. Sandeep; I.L. Animasaun
      Abstract: Publication date: Available online 7 April 2017
      Source:Alexandria Engineering Journal
      Author(s): G. Kumaran, N. Sandeep, I.L. Animasaun
      Flow and heat transfer behavior of magnetohydrodynamic Carreau and Casson fluids past an upper part of the paraboloid of revolution with space dependent internal heat source/sink is investigated theoretically. The buoyancy induced on the flow is considered in such way that the surface is neither vertical/horizontal nor wedge/cone. The equations that govern the flow are transformed using suitable similarity variables and solved numerically by employing R-K-F integration scheme. Graphical results are obtained to discuss the behavior of flow and temperature fields for various parameters of interest. Also the wall friction is computed and heat transfer coefficient is reduced. It is found that the boundary layers of temperature and velocity distributions are non-uniform for Carreau and Casson flows. Impact of drag force is high on Casson flow when equated with Carreau fluid.

      PubDate: 2017-04-12T18:31:36Z
      DOI: 10.1016/j.aej.2017.03.019
       
  • Electromagnetic & thermal analysis of synchronous generator with
           different rotor structures for aircraft application

    • Authors: Deepak Arumugam; Premalatha Logamani; Santha Karuppiah
      Abstract: Publication date: Available online 3 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Deepak Arumugam, Premalatha Logamani, Santha Karuppiah
      Alternator delivers power to a system which has high speed operations such as aircraft, marine industry, and automobile industries. So, it is necessary to evaluate the performance of this alternator during high speed operations. Finite Element Analysis (FEA) is an effective tool to analyze the performance of electrical machines with certain boundary conditions. In this paper, the FEA analysis of the 5KW alternator with two different rotor structures for high speed operation is presented. The transient electromagnetic FEA has been carried out which forms the basis for thermal modeling and thermal analysis of the alternator. Finally the overall electromagnetic and thermal performance of a prototype alternator with different rotors is compared experimentally.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.020
       
  • Novel realization of GIC based wave digital filters using Al-Alaoui
           transform

    • Authors: Richa Barsainya; Tarun Kumar Rawat
      Abstract: Publication date: Available online 1 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Richa Barsainya, Tarun Kumar Rawat
      By using the concepts of wave characterization, Al-Alaoui transform and generalized immittance converter (GIC), a new digital GIC structure is proposed which is capable of realizing all the standard second-order digital filter sections. The Al-Alaoui transform is utilized for reference circuit discretization, leading to development of second-order digital filter sections which possess better noise properties than the conventional GIC and GIC discretized using the fractional bilinear transform. The proposed second-order digital filter sections are used as building blocks in cascade synthesis of filter. Two design examples are considered to analyze the effectiveness of the proposed filter sections and their comparison with the other filter sections is performed in terms of quantization noise and approximation to analog filter response. The proposed synthesis yields lowpass and highpass filters that have a better signal to noise ratio and better approximation of the analog filter frequency response than the conventional GIC digital filters and fractional GIC digital filters.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.010
       
  • Lateral motion control of skid steering vehicles using full drive-by-wire
           system

    • Authors: Ossama Mokhiamar; Semaan Amine
      Abstract: Publication date: Available online 1 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Ossama Mokhiamar, Semaan Amine
      This paper introduces a control system to stabilize the motion of skid steering vehicles, extends their stability limit and makes their handling performance similar to that of the conventional two-wheel steering vehicle. For this purpose, the yaw rate response of the two degree of freedom (2DOF) linear model of the conventional two-wheel steering vehicle is chosen as a model response. The model following control theory is used to introduce the direct yaw moment needed to stabilize and steer the skid steering vehicle. The direct yaw moment has been split into the four tires based on two methods. The first method is based on a simple distribution technique (SD), whereas the second method is based on an independent distribution technique (ID) where the four wheels can be driven individually using a full drive-by-wire system. A comprehensive nonlinear dynamic model of the skid steering vehicle has been simulated using Matlab/Simulink in order to examine the effectiveness of the proposed control system. The results of both open and closed loop tests show that the proposed control system has a significant effect on stabilizing the lateral motion of skid steering vehicles as well as improving their handling characteristics.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.024
       
  • Formation, characterization and theoretical evaluation of combustion of
           biodiesel obtained from wax esters of A. Mellifera

    • Authors: R. Bharathwaaj; P.K. Nagarajan; A.E. Kabeel; B. Madhu; D. Mageshbabu; Ravishankar Sathyamurthy
      Abstract: Publication date: Available online 1 April 2017
      Source:Alexandria Engineering Journal
      Author(s): R. Bharathwaaj, P.K. Nagarajan, A.E. Kabeel, B. Madhu, D. Mageshbabu, Ravishankar Sathyamurthy
      The search for alternate and sustainable fuel for internal combustion engines which fulfils around 25% of energy needs has lead the researchers towards biodiesel which can be easily extracted from vegetable oils. Biodiesels can also be extracted from waxes, oligenius species of algae and pyrolysis oils. In the above mentioned materials waxes can be used predominantly because, they are entirely composed of esters of higher chain aliphatic alcohols. In the current study biodiesel from beeswax has been studied for its characteristics with the aid of analytical techniques such as GC-MS and FTIR spectrum. And also the properties of fuel and combustion chemistry of biodiesels have been discussed. The spectrum results have clearly shown the presence of five methyl esters of palmitic acid and oleic acid. Further the biodiesel is found to have density of 880kg/m3 and calorific value of 38.5MJ/kg with the Cetane number of 48. The analysis of the combustion of the fuel gives compromising results proving biodiesels from wax esters will be an excellent alternative to mineral diesel and will find a valuable position in list of materials that can be used for biodiesel formulation.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.021
       
  • Free vibration of thick laminated circular and annular plates using
           three-dimensional finite element analysis

    • Authors: Sumit Khare; Narain Das Mittal
      Abstract: Publication date: Available online 1 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Sumit Khare, Narain Das Mittal
      This paper presents a numerical analysis of free vibration of thick laminated circular plates, having free, clamped as well as simply-supported boundary conditions at outer edges. The finite element method that works on the basis of three-dimensional theory of elasticity is employed to evaluate the first ten natural frequencies of uniform circular plate. The effect of thickness ratios, fiber orientation angle (angle-ply and cross-ply), stacking sequences (symmetric and antisymmetric), radius ratios and boundary conditions on frequency parameter are discussed in detail. The first five natural modes of flexural vibrations for different boundary conditions are presented in pictorial forms. Verification of the accuracy of these results is verified by appropriate convergence study and checked with the results available in the literature.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.006
       
  • Exact solutions for free convection flow of generalized Jeffrey fluid: A
           Caputo-Fabrizio fractional model

    • Authors: Muhammad Saqib; Farhad Ali; Ilyas Khan; Nadeem Ahmad Sheikh; Syed Aftab Alam Jan; Samiulhaq
      Abstract: Publication date: Available online 1 April 2017
      Source:Alexandria Engineering Journal
      Author(s): Muhammad Saqib, Farhad Ali, Ilyas Khan, Nadeem Ahmad Sheikh, Syed Aftab Alam Jan, Samiulhaq
      The present article reports the applications of Caputo-Fabrizio time-fractional derivatives. This article generalizes the idea of free convection flow of Jeffrey fluid over a vertical static plate. The free convection is caused due to the temperature gradient. Therefore, heat transfer is considered for free convection. The classical model for Jeffrey fluid is written in dimensionless form with the help of non-dimensional variables. Furthermore, the dimensionless model is converted into a fractional model called as a generalized Jeffrey fluid model. The governing equations of generalized Jeffrey fluid model have been solved analytically using the Laplace transform technique. The recovery of existing solutions in the open literature is possible through this work in terms of classical Jeffrey fluid, fractional Newtonian fluid as well as classical Newtonian fluid. For various embedded parameters, the physics of velocity and temperature profiles is studied by means of numerical computation. This report provides a detailed discussion as well as a graphical representation of the obtained results.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.017
       
  • Eagilla: An Enhanced Mobile Agent Middleware for Wireless Sensor Networks

    • Authors: K. Lingaraj; Rajashree V. Biradar; V.C. Patil
      Abstract: Publication date: Available online 31 March 2017
      Source:Alexandria Engineering Journal
      Author(s): K. Lingaraj, Rajashree V. Biradar, V.C. Patil
      Agilla is the most common mobile agent middleware to facilitate adaptive applications in WSN. But due to lack of bandwidth and energy level in agilla, it is restricted to local tuples. This article presents eagilla, a middleware to support remote level multicasting wireless sensor networks. Eagilla organizes multicasting communication in different tuples, integrating mobile agents to the network for sensing data and to regulate the data to organize global communication. Eagilla model comes up with a hybrid multi-layered architecture to reduce the complexity and to support interoperability, heterogeneity in WSN. Eagilla provides non-functional requirements such as Qos, scalability, flexibility and reliability. The effectiveness of eagilla middleware is proved by conducting experiments in a professional environment.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.003
       
  • MHD flow of Ag-water nanofluid over a flat porous plate with viscous-Ohmic
           dissipation, suction/injection and heat generation/absorption

    • Authors: Himanshu Upreti; Alok Kumar Pandey; Manoj Kumar
      Abstract: Publication date: Available online 30 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Himanshu Upreti, Alok Kumar Pandey, Manoj Kumar
      The goal of the recent article is to identify the consequences of heat generation/absorption and suction/injection on MHD flow of Ag-water nanofluid past a stretching flat plat in a porous medium with Ohmic-viscous dissipation. The set of obtained ODEs have been solved along with auxiliary boundary conditions using a numerical approach calledRunge-Kutta-Fehlbergscheme through shooting technique. The influence of relevant parameters on dimensionless flow and thermal field profiles are shown by graphs and described in detail. Also the non-dimensional skin factor and heat transfer rate are stated as in tabular form. The results affirmed that as accelerated in the values of porosity parameter the coefficient of heat transfer reduces while it increases as raise in the suction/injection parameter. The outcomes also show that momentum boundary layer thickness declines on increasing the values of volume fraction of silver solid particles, but reverse trend is observed for thermal boundary layer.

      PubDate: 2017-04-05T08:04:15Z
      DOI: 10.1016/j.aej.2017.03.018
       
  • A combined scheme of pixel and block level splitting for medical image
           compression and reconstruction

    • Authors: H. Sunil; Sharanabasaweshwar G. Hiremath
      Abstract: Publication date: Available online 28 March 2017
      Source:Alexandria Engineering Journal
      Author(s): H. Sunil, Sharanabasaweshwar G. Hiremath
      Medical images are very important source of information of human body diagnosis or therapy. These images contain huge amount of information which needs to be compressed to reduce the storage capacity issues. These images require lossless compression techniques to save the information. Another crucial issue in medical imaging is to reconstruct image efficiently without losing information. In order to achieve the reconstruction of medical image we present a new approach by introducing convex-smoothing problems. This approach is implemented by dividing the input image into sub-problems. According to this approach we divide the input image into sub-problems which are solved by using compressed sensing method. After achieving the output of compressed sensed image, this problem is passed to the iterative process of problem solver to reduce the time, computational complexity and reconstruction error. Proposed model is implemented using MATLAB tool and tested with medical images. Results are carried in terms of the PSNR, reconstruction error and time.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.001
       
  • Nanoparticle shape effects on squeezed MHD flow of water based Cu, Al2O3
           and SWCNTs over a porous sensor surface

    • Authors: R. Kandasamy; Nur Atikah bt Adnan; Radiah Mohammad
      Abstract: Publication date: Available online 28 March 2017
      Source:Alexandria Engineering Journal
      Author(s): R. Kandasamy, Nur Atikah bt Adnan, Radiah Mohammad
      Impact of nanoparticle shape on the squeezed MHD flow of water based metallic nanoparticles over a porous sensor surface in the presence of heat source has been investigated. In distinctly most paramount studies, three distinctive forms of nanoparticle shapes are employed into account, i.e. sphere ( m = 3.0 ) , cylinder ( m = 6.3698 ) and laminar ( m = 16.1576 ) . The controlling partial differential equations (PDEs) are regenerated into ordinary differential equations (ODEs) by manipulating consistent conformity conversion and it is determined numerically by handling Runge Kutta Fehlberg method with shooting technique. It is noticed that the solid volume fraction and nanoparticle shape have powerful outputs in squeezing flow phenomena, the sphere shape nanoparticle in Cu – water and cylindrical shape in SWCNTs-water in the presence of magnetic field along with thermal radiation energy has better improvement on heat transfer as compared with the other nanoparticle shapes in different flow regimes.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.011
       
  • Analysis of the effects of use of thermal energy storage device (TESD) in
           solar air heater

    • Authors: Amol Wadhawan; A.S. Dhoble; V.B. Gawande
      Abstract: Publication date: Available online 27 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Amol Wadhawan, A.S. Dhoble, V.B. Gawande
      In this research work a setup is designed to incorporate Lauric acid as a phase changing material (PCM) in a solar air heater. This phase changing material (PCM) is carefully selected based on the application and manufacturing constraints. A thermal energy storage device (TESD) is manufactured and incorporated in solar air heater and experiments were carried out to compare the solar air heater with and without thermal energy storage device (TESD) to evaluate various parameters such as output temperature and pressure drop. Results revealed that the rise in the output air temperature decreases from 8.67K to 4K with the increase in the mass flow rate of air flowing through the solar air heater from 0.021kg/s to 0.035kg/s. Also with an increase in the mass flow rate, there is a decrease in the friction factor from 0.0119 to 0.00802. There is an average increment of 86.47% in the rise of output air temperature with TESD as compared to rise of the output air temperature without TESD with an average increment of 36.47% in friction factor. A computational analysis is also performed which gives insight into the working of solar air heater with thermal energy storage device (TESD). A computational domain of solar air heater with TESD is analyzed in CFD code FLUENT using various turbulence models such as k-ω SST, k-ω Standard, k-∊ Standard and k-∊ RNG. It is observed that results obtained from turbulence model k-є RNG model are in good agreement with the experimental results and hence used for the analysis of all the cases considered in this work.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.016
       
  • Simulating the effects of turbocharging on the emission levels of a
           gasoline engine

    • Authors: Amir Reza Mahmoudi; Iman Khazaee; Mohsen Ghazikhani
      Abstract: Publication date: Available online 27 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Amir Reza Mahmoudi, Iman Khazaee, Mohsen Ghazikhani
      The main objective of this work was to respond to the global concern for the rise of the emissions and the necessity of preventing them to form rather than dealing with their after-effects. Therefore, the production levels of four main emissions, namely NOx, CO2, CO and UHC in gasoline engine of Nissan Maxima 1994 is assessed via 1-D simulation with the GT-Power code. Then, a proper matching of turbine-compressor is carried out to propose a turbocharger for the engine, and the resultant emissions are compared to the naturally aspirated engine. It is found that the emission levels of NOx, CO, and CO2 are higher in terms of their concentration in the exhaust fume of the turbocharged engine, in comparison with the naturally aspirated engine. However, at the same time, the brake power and the brake specific emissions produced by the turbocharged engine are respectively higher and lower than those of the naturally aspirated engine. Therefore, it is concluded that, for a specific application, turbocharging provides the chance to achieve the performance of a potential naturally aspirated engine while producing lower emissions.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.005
       
  • A computational approach using modified trigonometric cubic B-spline for
           numerical solution of Burgers’ equation in one and two dimensions

    • Authors: Geeta Arora; Varun Joshi
      Abstract: Publication date: Available online 27 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Geeta Arora, Varun Joshi
      This article aims to obtain the numerical solution of nonlinear Burgers’ equation in one and two dimensions using hybrid trigonometric differential quadrature method. Simulating five different test problems, the obtained results are compared with exact solution as well as the numerical solution obtained by other researchers. The obtained numerical solutions of this equation are found to have a good match with the exact solutions. To demonstrate the applicability and robustness of the proposed scheme the L 2 and L ∞ norms are computed and the results are presented both numerically and graphically. The stability of the proposed scheme using the matrix method is also discussed in this article.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.02.017
       
  • First general solutions for unsteady unidirectional motions of rate type
           fluids in cylindrical domains

    • Authors: Nehad Ali Shah; Constantin Fetecau; Dumitru Vieru
      Abstract: Publication date: Available online 27 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Nehad Ali Shah, Constantin Fetecau, Dumitru Vieru
      The dimensionless velocity field corresponding to the motion of an Oldroyd-B fluid between two infinite coaxial circular cylinders induced by the outer cylinder that rotates around its symmetry axis with an arbitrary time-dependent velocity is determined using the integral transforms technique. The corresponding solution for the motion through an infinite circular cylinder is obtained as a limiting case of the previous solution. It is used to generate exact solutions for the motion due to the cylinder that applies an arbitrary longitudinal shear stress to the fluid. Finally, for a check of results that have been obtained as well as to correct some results from the literature and to get some physical insight for oscillating motions, three special cases are considered and some known results are recovered as limiting cases. The required time after which the fluid moves according to the steady-state solutions is graphically determined for sine and cosine oscillating motions.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.014
       
  • Characterization of functionally graded Al-SiCp metal matrix composites
           manufactured by centrifugal casting

    • Authors: I.M. El-Galy; M.H. Ahmed; B.I. Bassiouny
      Abstract: Publication date: Available online 27 March 2017
      Source:Alexandria Engineering Journal
      Author(s): I.M. El-Galy, M.H. Ahmed, B.I. Bassiouny
      The design of metal matrix composites can be enhanced by integrating the concept of functionally graded materials (FGM) to produce engineering materials with tailored contradictory properties that suit multifunctioning components. The present investigation focuses on characterization of functionally graded metal matrix composites (FGMMCs) based on pure aluminium matrix reinforced with different percentages and sizes of SiC particles. The investigated FGMs have been produced by horizontal centrifugal casting process under different conditions. Microstructure investigation, tensile, hardness and wear rate measurements have been correlated with the size and percentage of SiC particles and their distribution/gradient across the thickness of the cast tubes resulting from the used casting parameters.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.009
       
  • Effect of cross diffusion on MHD non-Newtonian fluids flow past a
           stretching sheet with non-uniform heat source/sink: A comparative study

    • Authors: J.V. Ramana Reddy; K. Anantha Kumar; V. Sugunamma; N. Sandeep
      Abstract: Publication date: Available online 27 March 2017
      Source:Alexandria Engineering Journal
      Author(s): J.V. Ramana Reddy, K. Anantha Kumar, V. Sugunamma, N. Sandeep
      The present study sought to report the combined influences of frictional and irregular heat on MHD non-Newtonian fluid (Casson and Maxwell) flows due to stretched surface. The action of thermal diffusion and diffusion thermo is scrutinized. The flow will take place due to stretched surface. The equations determining the flow condition are transfigured as coupled equations through self similarity transmutations. R.K. Fehlberg technique is implemented to acquire the solution of the problem. Graphs are plotted to inspect the influence of sundry physical quantities on the three routine profiles of the flow field. Further, expressions are procured for friction factor along with the rate of heat and mass transfers and discussed comprehensively through tabular forms. Results indicate that Casson fluid attains highest velocity when compared with Maxwell fluid. The mass transfer rate in Maxwell fluid is better than that of Casson fluid whereas a dissimilar phenomenon is discerned in heat transfer rate. Also Eckert number and irregular heat parameters have tendency to exalt the fluid temperature.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.008
       
  • Study on reducibility and porosity of metallurgical sinter

    • Authors: Simona Jursova; Pavlina Pustejovska; Silvie Brozova
      Abstract: Publication date: Available online 25 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Simona Jursova, Pavlina Pustejovska, Silvie Brozova
      The paper dealt with research on structural properties of metallurgical sinter. It was aimed at studying of sinter porosity and density in relation to its reducibility. For porosity determination was used immersion technique using Archimedes principle. Density was measured by gas pycnometer and apparent density was calculated from results of measured porosity. These properties were studied in relation to temperature 950°C at which reducibility tests of every sample were carried out according to ISO 4695:2007. For the study 7 batches of 5 samples of sinter originated from industrial metallurgical plant were sorted. The porosity and density were discussed for virgin samples before the test of reducibility and for reduced samples after ISO test. The effect of 950°C on the properties was contemplated and SEM analysis was carried out. The samples porosity before reduction test was in range from 5.1% to 9.82% and for the samples after reduction test it was 32.77–44.12%. The density of samples was not significantly affected by temperature with values ranging from 3.65 to 3.82gcm−3 for virgin samples, resp. 4.87–5.37gcm−3 for samples after reduction.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.007
       
  • A simple new iterative method for solving strongly nonlinear oscillator
           systems having a rational and an irrational force

    • Authors: Md. Abdur Razzak
      Abstract: Publication date: Available online 25 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Md. Abdur Razzak
      In this paper, a new noble modified iterative method is proposed to obtain the approximate solution of strongly nonlinear oscillator systems having a rational and an irrational forces. The approximate frequency and the corresponding periodic solution can easily be determined by the present proposed method. Two examples are considered to illustrate the effectiveness and convenience of this procedure. The results obtained in this paper show good agreement with the corresponding numerical solution (considered to be exact) for both small and large amplitudes of oscillation. Furthermore, the method provides better result than other existing results (those results obtained by several authors). The main advantage of the present method is its simplicity which contains up to third harmonic terms. These harmonic terms make the solution rapidly converge. The method is important and powerful for solving nonlinear oscillator systems arising in nonlinear science and engineering.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.013
       
  • Assessing the influence of weather parameters on rainfall to forecast
           river discharge based on short-term

    • Authors: A. Danladi; M. Stephen; B.M. Aliyu; G.K. Gaya; N.W. Silikwa; Y. Machael
      Abstract: Publication date: Available online 24 March 2017
      Source:Alexandria Engineering Journal
      Author(s): A. Danladi, M. Stephen, B.M. Aliyu, G.K. Gaya, N.W. Silikwa, Y. Machael
      Rain serves as one of the key components in water cycle and it comes in the form of water droplets that are condensed from atmosphere and then fall on earth surface as rainfall. It has much importance. However, excessive rainfall can cause environmental hazards. This work developed an adaptive neuro – fuzzy inference system (ANFIS) to relate certain weather parameters (temperature and relative humidity) with rainfall in order to forecast the amount of rainfall capable of causing River Yazaram in Mubi town to discharge. It is predicted that, Mubi will experience high rainfall on 7th, 27th and 30th August 2016 as 56mm, 28.8mm and 28.8mm respectively. Furthermore, on 7th August 2016 River Yazaram is likely to discharge. The model developed is validated with mean square percentage error (MAPE) of 4.64% and correlation coefficient of 0.1277 and 0.075 of rainfall with temperature and relative humidity respectively.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.004
       
  • Optimal placement of DG and DSTATCOM for loss reduction and voltage
           profile improvement

    • Authors: Fahad Iqbal; Mohd Tauseef Khan; Anwar Shahzad Siddiqui
      Abstract: Publication date: Available online 23 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Fahad Iqbal, Mohd Tauseef Khan, Anwar Shahzad Siddiqui
      Due to rapid depletion of fossil fuels availability and huge environmental pollution, focus is now changing from traditional method of power generation to the non-conventional DERs located at distribution voltage level. Technological advancement and more researches in the use of DERs result in the formation of microgrids and active distribution network. Small DER units when placed in a network near to load, makes the network stable as it can work in islanding mode in case of any fault outside the network. This paper proposes a scheme for reduction in losses and improvement of bus voltages in the active distribution network. A DG in the form of small renewable energy resources such as solar PV, wind, biomass, is placed optimally for reduction of losses in the network. However, placement of DG does not result in fulfilment of reactive power needs of the network, resulting in under voltage at several buses. This under voltage problem is solved by the optimal placement of DSTATCOM. DLF technique is used in this paper for load flow calculations and LSF along with voltage deviation is used in objective function for optimal location of DG on MATLAB platform. The methodology is tested on 33-bus radial distribution system.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.03.002
       
  • Numerical investigation of fully developed periodic turbulent flow in a
           square channel fitted with 45° in-line V-baffle turbulators pointing
           upstream

    • Authors: H.E. Fawaz; M.T.S. Badawy; M.F. Abd Rabbo; Amr Elfeky
      Abstract: Publication date: Available online 23 March 2017
      Source:Alexandria Engineering Journal
      Author(s): H.E. Fawaz, M.T.S. Badawy, M.F. Abd Rabbo, Amr Elfeky
      This paper presents numerical simulation of periodic fully developed turbulent flow and thermal characteristics in a square channel fitted with V-baffles using air as the working fluid at Re ranging from 5000 to 25000. V-baffles with an angle of attack of 45° pointing upstream are mounted in both lower and upper walls with an in-line arrangement. Effect of various baffle blockage ratios (BR=0.2, 0.4 and 0.6) and baffles pitch ratios (PR=0.5,1 and 1.5) on flow behavior and heat transfer are investigated. The results show that the V-baffle induces four counter-rotating vortices, and their core centers appear to spirally move close to each other along the baffle cavity which leads to induce better flow mixing between the core and wall flow regions. Also, V-baffle pointing upstream causes high impinging regions on the channel walls leads to higher Nusselt number rates in jet impinging areas. Higher BR and/or lower PR result in an increase in Nusselt number. Thermal enhancement factor tends to increase as BR decreases. The BR=0.2 give value of thermal enhancement factor=0.78 at the lower Re =5000. Also, lower value of PR (PR=0.5) leads to higher enhancement factor.

      PubDate: 2017-03-29T12:34:55Z
      DOI: 10.1016/j.aej.2017.02.020
       
  • Unsteady MHD convective flow of a Jeffery fluid embedded in a porous
           medium with ramped wall velocity and temperature

    • Authors: K. Maqbool; A.B. Mann; M.H. Tiwana
      Abstract: Publication date: Available online 18 March 2017
      Source:Alexandria Engineering Journal
      Author(s): K. Maqbool, A.B. Mann, M.H. Tiwana
      Effects of ramped wall velocity and ramped wall temperature on unsteady MHD free convective flow of a Jeffrey fluid near an infinite vertical flat plate embedded in a porous medium are examined. The momentum and energy equation are solved by Laplace Transform Method. The skin friction coefficient and Nusselt number are calculated and finally the effects of emerging parameters are graphically shown and discussed.

      PubDate: 2017-03-22T15:02:03Z
      DOI: 10.1016/j.aej.2017.02.012
       
  • Maximum output voltage and frequency of single electron tunneling inverter
           for variable temperature and load capacitance

    • Authors: Ali A. Elabd; EL-Sayed M. El-Rabaie; Abdelaziz T. Shalaby
      Abstract: Publication date: Available online 18 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Ali A. Elabd, EL-Sayed M. El-Rabaie, Abdelaziz T. Shalaby
      Studying of single electronics should consider both the temperature and the circuit capacitance as being the most important parameters that affect the behavior of SET devices. In this letter, the delay and the output voltage level in the single electron tunneling inverter are investigated for a wide range of temperature and load capacitance. Due to the stochastic nature of the electron transports in single electronics, the results are considered to be the average of many Monte Carlo computations.

      PubDate: 2017-03-22T15:02:03Z
      DOI: 10.1016/j.aej.2017.02.026
       
  • Dynamics of prey predator with Holling interactions and stochastic
           influences

    • Authors: C.V. Pavan Kumar; K. Shiva Reddy; M.A.S. Srinivas
      Abstract: Publication date: Available online 18 March 2017
      Source:Alexandria Engineering Journal
      Author(s): C.V. Pavan Kumar, K. Shiva Reddy, M.A.S. Srinivas
      The ecological interaction between prey and predator is modeled in general linear (or) function of prey density. The main advantages of such functional response are its simplicity, and well understood. The functional response should depend not only on the prey density but also on the predator density. In this paper a two species prey predator eco system having Holing type III functional response under stochastic influence is investigated. The analysis for the stability, local as well as global, of the model is performed by employing the techniques of Routh-Hurwitz and Lyapunov. Diffusive instability is also verified by perturbation technique and Routh-Hurwitz criteria. The fluctuations of the population and their stability around the equilibrium point influenced by the noise are computed. Numerical simulations illustrated, the theoretical analysis.

      PubDate: 2017-03-22T15:02:03Z
      DOI: 10.1016/j.aej.2017.02.004
       
  • A Multi-Synchronous Bi-Directional NoC (MBiNoC) architecture with dynamic
           self-reconfigurable channel for the GALS infrastructure

    • Authors: Rajeev Kamal; Juan M. Moreno Arostegui
      Abstract: Publication date: Available online 16 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Rajeev Kamal, Juan M. Moreno Arostegui
      To enhance the performance of on-chip communications of Globally Asynchronous Locally Synchronous Systems (GALS), a dynamic reconfigurable multi-synchronous router architecture is proposed to increase network on chip (NoC) efficiency by changing the path of the communication link in the runtime traffic situation. In order to address GALS issues and bandwidth requirements, the proposed multi-synchronous bidirectional NoC’s router is developed and it guarantees higher packet consumption rate, better bandwidth utilization with lower packet delivery latency. All the input/output ports of the proposed router behave as a bi-directional ports and communicate through a novel multi-synchronous first-in first-out (FIFO) buffer. The bidirectional port is controlled by a dynamic channel control module which provides a dynamic reconfigurable channel to the router itself and associated sub-modules. This proposed multi-synchronous bidirectional router architecture is synthesized using Xilinx ISE 14.7 and FPGA Virtex 6 family device XC6VLX760 is considered as target technology and its performance is evaluated in terms of power, area and delay.

      PubDate: 2017-03-17T00:00:16Z
      DOI: 10.1016/j.aej.2017.02.019
       
  • Thin film flow of a second grade fluid in a porous medium past a
           stretching sheet with heat transfer

    • Authors: Noor Saeed Khan; Saeed Islam; Taza Gul; Ilyas Khan; Waris Khan; Liaqat Ali
      Abstract: Publication date: Available online 15 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Noor Saeed Khan, Saeed Islam, Taza Gul, Ilyas Khan, Waris Khan, Liaqat Ali
      This article inquires into the steady boundary layer flow and heat transfer properties of a thin film second-grade fluid through a porous medium past a stretching sheet concerning the effect of viscous dissipation. The aim of the study is to discuss the impacts of film thickness and porosity in the presence of constant reference temperature which completely affect the flow pattern and bring changes in the cooling/heating. The basic governing equations of the problem have been modeled in terms of suitable similarity transformations which result in nonlinear ordinary differential equations with physical conditions. Solution has been obtained by using HAM (Homotopy Analysis Method) which is frequently used for solving nonlinear differential equations encountered in various applied sciences and is found quite useful. Favorable comparison with previously published research papers is performed to show the correlations for the present work. Skin friction coefficient and Nusselt number are presented through tables which describe the verification for the achieved results showing that the thin liquid film results from this study are in close agreement with the results reported in the literature. The physical influences of all the emerging parameters on velocity and temperature fields have been studied graphically and illustrated clearly. The authentication of the present work has been achieved by evaluating the comparison of HAM solution with the numerical method solution. Results achieved by HAM and residual errors are also discussed numerically and graphically.

      PubDate: 2017-03-17T00:00:16Z
      DOI: 10.1016/j.aej.2017.01.036
       
  • Peristaltic propulsion of particulate non-Newtonian Ree-Eyring fluid in a
           duct through constant magnetic field

    • Authors: N. Ijaz; A. Zeeshan; M.M. Bhatti
      Abstract: Publication date: Available online 13 March 2017
      Source:Alexandria Engineering Journal
      Author(s): N. Ijaz, A. Zeeshan, M.M. Bhatti
      This article is devoted to study peristaltic propulsion of particle suspended in Ree-Eyring fluid in a region where a constant magnetic field is applied. The governing flow problem is modelled for fluid phase and particle phase with the help of law of conservation of mass and momentum. It is assumed that flow is creeping and wave travelling along the wall has greater wavelength when compared with amplitude. The equations so obtained are coupled partial differential equations. The exact solutions using Eigen function expansion method is obtained and presented. The influence of all the physical parameters is discussed for Newtonian and non-Newtonian fluid with the help of graphs. In the present analysis, it is observed that due to influence of Hartmann number, the magnitude of the velocity diminishes.

      PubDate: 2017-03-17T00:00:16Z
      DOI: 10.1016/j.aej.2017.02.009
       
  • Numerical solution of fractional order smoking model via laplace Adomian
           decomposition method

    • Authors: Fazal Haq; Kamal Shah; Ghaus ur Rahman; Muhammad Shahzad
      Abstract: Publication date: Available online 13 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Fazal Haq, Kamal Shah, Ghaus ur Rahman, Muhammad Shahzad
      Smoking is one of the major cause of health problems around the globe. The present article deals with the dynamics of giving up smoking model of fractional order. We study analytical solution (approximate solution) of the concerned model with the help of Laplace transformation. The solution of the model will be obtained in form of infinite series which converges rapidly to its exact value. Moreover, we compare our results with the results obtained by Runge-Kutta method. Some plots are presented to show the reliability and simplicity of the method.

      PubDate: 2017-03-17T00:00:16Z
      DOI: 10.1016/j.aej.2017.02.015
       
  • A note on fractional difference operators

    • Authors: P. Baliarsingh; L. Nayak
      Abstract: Publication date: Available online 11 March 2017
      Source:Alexandria Engineering Journal
      Author(s): P. Baliarsingh, L. Nayak
      In the present article, following on very recent and new approach of fractional difference operator by Baliarsingh (2016), we establish some new ideas involving the exponent rules of this operator. In fact, the new results are sufficient enough to describe the results obtained by Baliarsingh and also provide certain improvements on them.

      PubDate: 2017-03-17T00:00:16Z
      DOI: 10.1016/j.aej.2017.02.022
       
  • A quadratic trigonometric weighted spline with local support basis
           functions

    • Authors: Muhammad Sarfraz; Shamaila Samreen; Malik Zawwar Hussain
      Abstract: Publication date: Available online 9 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Muhammad Sarfraz, Shamaila Samreen, Malik Zawwar Hussain
      A proficient freeform curve design technique is developed by constructing B-spline like local support basis functions using a quadratic trigonometric function introduced. The built basis functions fulfill the properties of the local support, partition of unity and the positivity. The freeform designed curve method, by these constructed local support basis functions, owns the geometric properties such as convex hull and variation diminishing. In the suggested scheme, the Non-uniform freeform curve depiction is presented for deliberation by a transformed Bézier form. The demonstration of the scheme is supportive for various shape effects such as interval tension. As a privilege, the proposed method is C 2 for its default case and is C 1 in general. The proposed method provides a quadratic alternative to the cubic B-splines.

      PubDate: 2017-03-17T00:00:16Z
      DOI: 10.1016/j.aej.2017.02.016
       
  • Multi-objective parametric optimization of nano powder mixed electrical
           discharge machining of AlSiCp using response surface methodology and
           particle swarm optimization

    • Authors: Shalini Mohanty; Ankan Mishra; B.K. Nanda; B.C. Routara
      Abstract: Publication date: Available online 9 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Shalini Mohanty, Ankan Mishra, B.K. Nanda, B.C. Routara
      Powder mixed electrical discharge machining (PMEDM) has gained popularity in the current era owing to its benefits of providing better material removal rate (MRR), less electrode wear rate (EWR) and improvement in surface finish. The use of powders enhances the machining characteristics of the EDM processes. Low voltage current (LVC), high voltage current (HVC), pulse-on time (T on), pulse-off time (T off) and flushing pressure (FP) are the input variables on which certain machining parameters such as material removal rate (MRR), surface roughness (Ra ) and tool wear rate (TWR) are analysed. A copper electrode of 99.98% purity with a diameter of 12mm was used to cut AlSiCp12% metal matrix composite (MMC) in EDM. Box Behnken design was used for planning the experimental run. The parameters were optimized using desirability approach as multi-objective optimization technique for predicting the significance of the parameters. In addition to all this, particle swarm optimization (PSO) was implemented for predicting the results and hence error analysis was done for the set of experiments. Moreover, a confirmatory test was carried out with the parametric settings obtained from PSO and hence the error percentage was determined. Validation tests showed close relationship of predicted and experimental results.

      PubDate: 2017-03-09T16:33:38Z
      DOI: 10.1016/j.aej.2017.02.006
       
  • Dynamic mechanical, thermal and wear analysis of Ni-P coated glass
           fiber/Al₂O₃ nanowire reinforced vinyl ester composite

    • Authors: G. Anand; N. Alagumurthi; R. Elansezhian; N. Venkateshwaran
      Abstract: Publication date: Available online 9 March 2017
      Source:Alexandria Engineering Journal
      Author(s): G. Anand, N. Alagumurthi, R. Elansezhian, N. Venkateshwaran
      Hybrid polymer composites nowadays are increasingly used in many engineering products which are subjected to wear, dynamic mechanical and thermal applications. So in the present study, we have investigated the evaluation of dynamic mechanical, thermal and wear properties of vinyl ester hybrid composite strengthened with Ni-P coated E-glass fiber and Al₂O₃ nanowires as reinforcement at different concentrations. Nickel-Phosphorus is plated over the glass fiber substrate by means of the electroless plating method. The best optimum bath composition was determined after many trials and used for the proper plating process. From the outcome of the result, it is clear that the storage modulus has a trend to increase with increase in the concentration of Ni-P coated glass fiber (GF) and further increases when Al₂O₃ nanowires are used as the reinforcement. The glass transition temperature is also shifted to the higher temperature in the process. From the thermogravimetric analysis, it is clear that the thermal stability of the composite steps up with the addition of Al₂O₃ nanowires as fillers and Ni-P/GF as reinforcement. The wear properties are analyzed and the morphology of the coated and worn-out surfaces are studied by means of scanning electron micrographs and optical microscope images.

      PubDate: 2017-03-09T16:33:38Z
      DOI: 10.1016/j.aej.2017.02.013
       
  • Thermo-electric modelling, simulation and experimental validation of
           powder mixed electric discharge machining (PMEDM) of BeCu alloys

    • Authors: Vijaykumar Jatti; Shivraj Bagane
      Abstract: Publication date: Available online 9 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Vijaykumar S. Jatti, Shivraj Bagane
      Beryllium copper alloy has high strength, nonmagnetic, good wear resistance, corrosion resistance, high fatigue strength and non-sparking qualities. These properties impose machining issues when machined by conventional machining processes. Electric discharge machining is a practically viable solution to machine such materials. Recently researchers have been attracted by powder mixed electric discharge machining with the advancement in technology. Present study focuses on developing Finite Element model of Powder Mixed Electric Discharge Machining of Beryllium copper alloy with experimental validation. An axis symmetric three-dimensional model has been developed and simulated using ANSYS 15.0 software for obtaining the temperature distribution on the surface of workpiece during a single discharge machining process. And the temperature profile was utilized to estimate the material removal rate. Experiments were performed to validate the numerical results. The average percentage error of 7.8% was obtained between numerical and experimental results. Thus, a good agreement between the experimental and numerical results shows that the software model can efficiently simulate and predict the real time results.

      PubDate: 2017-03-09T16:33:38Z
       
  • A simple analytical model for free vibration of orthotropic and
           functionally graded rectangular plates

    • Authors: Hadi Ghashochi-Bargh; Soheil Razavi
      Abstract: Publication date: Available online 8 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Hadi Ghashochi-Bargh, Soheil Razavi
      With the widespread application of composite structures in engineering, the static and dynamic analyses of these structures have become important in the past years. Composite and functionally graded plates have been frequently being used and are important parts of many engineering structures. Numerous plate theories and solution procedures have been presented to predict the linear dynamic response of composite and functionally graded plates. This study aims to develop a simple analytical model to predict the free vibration response of orthotropic and functionally graded rectangular plates with clamped and simply-supported boundary conditions. To this end, Mindlin’s shear deformation plate theory has been used to obtain the equations of motion in terms of transverse displacement and rotations of mid-plane of the plate. After expressing the rotation parameters in terms of the transverse displacement, they have been substituted into equation of transverse motion of the plate. Then, for each boundary condition, an appropriate function has been assumed for the transverse displacement of the plate. Using the orthogonality of these functions, the natural frequencies of the plate have been determined. Some examples have been provided to validate the proposed model.

      PubDate: 2017-03-09T16:33:38Z
      DOI: 10.1016/j.aej.2017.02.005
       
  • Finite element analysis for structural modification and control resonance
           of a vertical pump

    • Authors: Dalia M. El-Gazzar
      Abstract: Publication date: Available online 7 March 2017
      Source:Alexandria Engineering Journal
      Author(s): Dalia M. El-Gazzar
      The main objective of this research was to evaluate and enhance dynamic performance for a vertical pumping unit. The original electric motor of the pump unit had been replaced by another one different in design and weights. Vibration has been increased greatly after installing the new motor. Consequently, it is necessary to estimate the change in the vibration characteristics owing to the difference in the boundary conditions of the new motor. Measured vibration levels and frequency analysis were dangerous at 1× due to resonance problem. Finite Element Analysis was used to model the motor structure in order to find its natural frequencies and mode shapes. The results confirm that the third natural frequency is very close to 1× operating speed with deviation about 1%. To solve the resonance problem, it was recommended to increase the structure stiffness. The results after modifications confirmed that the overall vibration level decreases by 89%.

      PubDate: 2017-03-09T16:33:38Z
      DOI: 10.1016/j.aej.2017.02.018
       
  • Kinetic studies on extraction of essential oil from sandalwood (Santalum
           album) by microwave air-hydrodistillation method

    • Authors: H.S. Kusuma; M. Mahfud
      Abstract: Publication date: Available online 6 March 2017
      Source:Alexandria Engineering Journal
      Author(s): H.S. Kusuma, M. Mahfud
      Essential oil from sandalwood is commonly obtained by conventional extraction methods which requires great energy, significant amount of solvents, and quite a long process time. Therefore, the use of new ‘green method’ for extracting essential oil with minimum/low energy, solvents, and time needs to be considered. One extraction method that has been successfully developed is microwave hydrodistillation method. This research employs a method developed from microwave hydrodistillation, that is microwave air-hydrodistillation for optimizing the extraction of essential oil. The purpose of this study was to examine the effect of the presence and absence of additional air flow to the microwavehydrodistillation method. The material used in this study includes sandalwood powder. The extractions by microwave hydrodistillation and microwave air-hydrodistillation methods were done on the power of 600W; the ratio of the raw material to be extracted and the solvent was 0.05gmL−1 and the extraction time was 120min. In the extraction by microwave air-hydrodistillation, the rates of air flow used were 0.1, 0.5, 1.5, 3.0, and 5.0L/min. The results of the research show that the extraction of sandalwood oil by microwave air-hydrodistillation is faster and produces higher yields compared to the extraction by microwave hydrodistillation method. Based on kinetics modeling that has been done, it can be said that the second-order kinetic model more can represent well the experimental results of sandalwood oil extraction by microwave hydrodistillation and microwave air-hydrodistillation methods when compared with the first-order kinetic model. The testing of the physical properties of the sandalwood oil indicates that essential oil obtained by microwave hydrodistillation and microwave air-hydrodistillation has the same quality (refractive index and specific gravity). Further, the testing of the chemical properties of the sandalwood oil shows that essential oil obtained by microwave air-hydrodistillation has better quality (flavor) compared to the oil obtained by microwave hydrodistillation.

      PubDate: 2017-03-09T16:33:38Z
      DOI: 10.1016/j.aej.2017.02.007
       
  • Magnetic field effect on nanofluid flow between two circular cylinders
           using AGM

    • Authors: M. Sheikholeslami; P. Jalili; D.D. Ganji
      Abstract: Publication date: Available online 6 March 2017
      Source:Alexandria Engineering Journal
      Author(s): M. Sheikholeslami, P. Jalili, D.D. Ganji
      In this paper, uniform magnetic field impact on nanofluid flow between two circular cylinders is investigated analytically using AGM. Two phase model is applied for nanofluid. Analytical procedures are examined for various active parameters namely aspect ratio, Hartmann number, Eckert number, Reynolds number, thermophoresis and Brownian parameters and Schmidt number. Results indicate that velocity reduces with augment of Lorentz forces but it rises with augment of Reynolds number. Temperature gradient enhances with rise of Hartmann number but it decreases with augment of other parameters.

      PubDate: 2017-03-09T16:33:38Z
      DOI: 10.1016/j.aej.2017.02.010
       
 
 
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