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ENGINEERING (1203 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Hybrid Journal   (Followers: 6)
AASRI Procedia     Open Access   (Followers: 15)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 233)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 6)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 7)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 15)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 10)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 37)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 30)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 15)
Applied Clay Science     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 7)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 8)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
Batteries     Open Access   (Followers: 4)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 10)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 9)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 41)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
Case Studies in Thermal Engineering     Open Access   (Followers: 3)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 8)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 5)
Coatings     Open Access   (Followers: 3)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 26)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 257)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 181)
Composites Part B : Engineering     Hybrid Journal   (Followers: 237)
Composites Science and Technology     Hybrid Journal   (Followers: 216)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 14)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 28)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 10)
Computing and Visualization in Science     Hybrid Journal   (Followers: 5)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 30)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 9)
Control Engineering Practice     Hybrid Journal   (Followers: 42)
Control Theory and Informatics     Open Access   (Followers: 8)
Corrosion Science     Hybrid Journal   (Followers: 25)
CT&F Ciencia, Tecnologia y Futuro     Open Access  
CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 58)

        1 2 3 4 5 6 7 | Last

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  [3044 journals]
  • Architecture of mosques and Islamic centers in Non-Muslim context

    • Abstract: Publication date: Available online 14 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Engy Farrag
      Islam is the fastest growing religion in the world. The Muslim population increases as Islam spreads around the world, which leads to an increasing demand for Islamic buildings such as mosques and Islamic centres. Mosques play an important role in Islam and Muslim life. In several countries, in particular, the Western mosques are seen asa newcomer whose building type is both unique and foreign to local people who are unaccustomed to the visual expression of Islam in the West. The mosque is one of the most visual expressions of global Muslim religious identity in non-Muslim context. The significant numbers of countries have a lot of different architecture styles of their Islamic buildings. Each mosque has its own individual touch. The most important factors behind this variation in form and styles can be divided into nature impacts as (local materials and environment), followed by man-made impacts by (Muslim immigrants, colonialism, funding, and laws, culture, and traditions). The study aims to examine each factor and their influences on the architecture of mosques and Islamic centers in non-Muslim context through analysis and a comparison of a number of examples.

      PubDate: 2017-09-16T17:13:23Z
  • Free convection flows over a vertical plate that applies shear stress to a
           fractional viscous fluid

    • Abstract: Publication date: Available online 14 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Nehad Ali Shah, Azhar Ali Zafar, Constantin Fetecau
      Free convection flow of a fractional viscous fluid over an infinite vertical plate with exponential heating is studied using a fractional derivative with non-singular kernel. Fluid motion is induced by the plate that applies an arbitrary time-dependent shear stress to the fluid. Closed-form solutions for the dimensionless velocity and temperature fields and Nusselt number are established under the usual Boussinesq approximation. The obtained results can generate exact solutions for any motion with technical relevance of this type. Moreover, fluid’s velocity is presented as a sum of its mechanical and thermal components. A semi analytical solution based on the Stehfest’s formula for the inverse Laplace transform is also obtained. Finally, the influence of fractional parameter on the fluid motion as well as the contributions of mechanical and thermal components of velocity are graphically underlined and discussed.

      PubDate: 2017-09-16T17:13:23Z
  • Numerical exploration of a non-Newtonian Carreau fluid flow driven by
           catalytic surface reactions on an upper horizontal surface of a paraboloid
           of revolution, buoyancy and stretching at the free stream

    • Abstract: Publication date: Available online 14 September 2017
      Source:Alexandria Engineering Journal
      Author(s): I.L. Animasaun, I. Pop
      Geometrically, the upper pointed surface of an aircraft and bonnet of a car are examples of upper horizontal surfaces of a paraboloid of revolution (uhspr). The motion of these objects strongly depends on the boundary layer that is formed within the immediate space on it. However, each of these surfaces is neither a horizontal/vertical nor cone/wedge and neither a cone nor a wedge. This article presents the motion of 2-dimensional Blasius flow of Carreau fluid on the surface of such object. The case in which the reaction between the Carreau fluid and catalyst at the surface produces significant temperature differences which consequently set up buoyancy-driven flows within the boundary layer is investigated. Single first-order Arrhenius kinetics is adopted to model the reaction on the surface of the catalyst situated on uhspr which initiates the free convection. Suitable similarity variables are applied to non-dimensionalized, parameterized and reduce the governing partial differential equations to a coupled ordinary differential equations (BVP). The BVP is solved numerically using the shooting technique. Temperature distribution in the flow of viscoelastic Carreau fluid is greater than that of a Newtonian fluid. Local heat transfer rate decreases faster when the Carreau fluid is characterized as shear-thinning. Maximum concentration is guaranteed at a small value of power-law index n and large value of thickness parameter.

      PubDate: 2017-09-16T17:13:23Z
  • Revolving flow of a fluid-particle suspension with suction

    • Abstract: Publication date: Available online 14 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Muhammad Rahman, Helge I. Andersson
      The three-dimensional revolving flow of a particle-fluid suspension above a plane surface is considered. The flow represents an extension of the classical Bödewadt flow to a two-fluid problem. The governing equations for the two phases are coupled through an interaction force with the particle relaxation time τ as a free parameter. By means of a similarity transformation, the coupled set of non-linear ODEs becomes a two-point boundary value problem. The numerical results show that the radial inward particle velocity increases whereas the circumferential velocity decreases by shortening τ , thereby strengthening the spiralling particle motion. These predictions are consistent with the so-called tea-cup effect, i.e. accumulation of tea leaves at the centre of the cup. On the contrary, the revolving fluid motion is reduced as a result of the particle-fluid interactions.

      PubDate: 2017-09-16T17:13:23Z
  • Study of different parameters estimation methods of Weibull distribution
           to determine wind power density using ground based Doppler SODAR

    • Abstract: Publication date: Available online 13 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Prem Kumar Chaurasiya, Siraj Ahmed, Vilas Warudkar
      The effectiveness of nine different numerical methods is examined for calculating the parameters of Weibull distribution at three different heights 80m, 100m and 120m to estimate wind power density. The measurement campaign was conducted at Kayathar, Tamil Nadu, India. The time series wind data were recorded using SecondWind Triton SODAR (Sound Detection and Ranging) instrument. Firstly, the fidelity assessment of SODAR measurement was examined. The aim of this study is to identify the more accurate method for computing wind power density of a selected region. The performance of the selected methods is judged based on goodness of fit test i.e. Root Mean Square Error Test (RMSE), Coefficient of Determination (R2), Mean Absolute Percentage Error (MAPE), and Chi-square Test (X2). Wind power densities are estimated with the help of estimated parameter values. This study proposes an approach to utilize SODAR and also aims to examine the accuracy of SODAR measurement by comparing the results with cup anemometer, in an attempt to establish adequate criteria for an effective utilization of SODAR for wind resource assessment. The results suggest that SODAR may be used asan alternative to meteorological mast.

      PubDate: 2017-09-16T17:13:23Z
  • Swelling soils treatment using lime and sea water for roads construction

    • Abstract: Publication date: Available online 12 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Dina A. Emarah, Safwat A. Seleem
      The cyclic heave and settlement of expansive soils could be the main reason to considerable damages to the structures, roads and highways. In Egypt there are many regions containing such expansive soils especially at the desert lands. The remote areas are used now for establishing many projects such as (wind farms, solar plants, irrigation projects and nuclear power plants). The use of a mixture of lime-treated swelling soil mixed with potable water to overcome the swelling potential of these soils is available in many countries especially in U.S.A. For the projects located adjacent to the coasts of Sea, the sea water is available instead of potable water. This paper presents an experimental and field case study on the lime-treated soil but mixed with sea water instead of potable water. The effect of using sea water instead of potable water on the swelling behavior, engineering properties, and the consolidation parameters were studied. On the other hand, this research deals with the behavior of the lime-treated soil in swelling state as well as in consolidation state. Tests results showed that there are significant reductions in the swelling potential, engineering properties, and the consolidation parameters in case of using sea water instead of potable water as mixing water. The environmental and economic impact gained from such process was put into consideration.

      PubDate: 2017-09-16T17:13:23Z
  • Parametric enhancement of a novel microstrip patch antenna using Circular
           SRR Loaded Fractal Geometry

    • Abstract: Publication date: Available online 12 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Deepanshu Kaushal, T. Shanmuganantham
      The improvement in the performance of a novel microstrip patch antenna through added stages of a fractal geometry and a circular split ring resonator for multiband operation is presented. In its first stage, a coaxial-fed novel shaped patch is developed over a 60mm×60mm×1.6mmFR4 epoxy substrate. The modification of the basic patch structure into a fractal geometry results into the addition of bands along with the parametric enhancement of reflection coefficient, gain and bandwidth. A further stamping of Circular Split Ring Resonator on reverse side of the substrate would result in significantly improved performance. The validation of the simulated results has been done and the measured set of data has been plotted against the simulated results graphically.

      PubDate: 2017-09-16T17:13:23Z
  • Asymmetric cascaded half-bridge multilevel inverter without polarity

    • Abstract: Publication date: Available online 12 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Mahrous Ahmed, Ahmed Sheir, Mohamed Orabi
      In this paper, New asymmetric cascaded half H bridge multilevel inverter MLI is proposed. It is driven from the conventional asymmetric cascaded half H Bridge multilevel inverter. Thus, the proposed topology inherits its simplicity, flexibility and modularity in both construction and control. By proper choice of the input DC sources values and interconnection, proposed topology can eliminate the need for polarity generation circuit which normally associated with the cascaded half H-bridge. Therefore, reduces number of switches that require high blocking voltage. The selective harmonic elimination SHE method is applied to generate switching pattern to eliminate harmonics inherently associated with MLI. The proposed topology switching pattern naturally reduces component’s voltage stress, switching losses and finally decrees MLI size and cost. Mathematical expressions and analysis have been driven as well as comparison with other topologies. The validity of the proposed topology is verified with Matlab/Simulink model and then a prototype is built and experimental results are presented.

      PubDate: 2017-09-16T17:13:23Z
  • Experimental study on an IC engine in-cylinder flow using different
           steady-state flow benches

    • Abstract: Publication date: Available online 12 September 2017
      Source:Alexandria Engineering Journal
      Author(s): M. El-Adawy, M.R. Heikal, A. Rashid A. Aziz, M.I. Siddiqui, Hasanain A. Abdul Wahhab
      In-cylinder air flow structures are known to strongly impact on the performance and combustion of internal combustion engines (ICE). Therefore the aim of this paper is to experimentally study an IC engine in-cylinder flow under steady-state conditions. Different methods can be used to characterize the in-cylinder flow which are optical engines and laser diagnostics, computational fluid dynamic and steady-state flow bench. Here we are concentrating on two different types of flow benches. The first (Ricardo) uses the impulse torque meter method while the other (FEV) uses the paddle wheel technique. The experiments were carried out on the same cylinder head and the same pressure difference across the inlet valves of 600mmH2O in order to compare the results. The experimental results are presented in terms of the measured air flow rate, flow coefficient, discharge coefficient and non-dimensional rig tumble. Moreover, number of modifications were conducted on the FEV flow bench in order to apply particle image velocimetry measurements on the vertical tumble plane, which passing through the middle of the cylinder at different valve lifts. The results show that a reasonably good level of agreement can be achieved between both methods, providing the methods of calculations of the various parameters are consistent.

      PubDate: 2017-09-16T17:13:23Z
  • Study of heat and mass transfer on MHD Walters B′ nanofluid flow induced
           by a stretching porous surface

    • Authors: S.R. Mishra; S. Baag; M.M. Bhatti
      Abstract: Publication date: Available online 5 September 2017
      Source:Alexandria Engineering Journal
      Author(s): S.R. Mishra, S. Baag, M.M. Bhatti
      This communication deals with the role of heat and mass transfer in a Walters B ′ (non-Newtonian) nanofluid fluid flow through a stretching vertical porous surface. The behavior of Brownian motion, chemical reaction, thermophoresis and heat generation/absorption are also taken into consideration. A suitable similarity transformation variable is utilized to model the equations of nanoparticle concentration, momentum, and thermal energy. These ordinary differential equations are solved analytically by means of perturbation technique and then solved numerically using fourth-fifth order Runge–Kutta method. The behavior of all the sundry parameters are discussed and demonstrated via graphs. Furthermore, Sherwood number, Nusselt number and skin friction coefficient are also displayed via graphs. A numerical comparison is also presented against skin friction coefficient, Nusselt number and Sherwood number with previously published data.

      PubDate: 2017-09-10T12:43:06Z
      DOI: 10.1016/j.aej.2017.08.007
  • Nanofluid flow on the stagnation point of a permeable non-linearly
           stretching/shrinking sheet

    • Authors: A. Malvandi; F. Hedayati; D.D. Ganji
      Abstract: Publication date: Available online 5 September 2017
      Source:Alexandria Engineering Journal
      Author(s): A. Malvandi, F. Hedayati, D.D. Ganji
      This paper studies a steady two-dimensional stagnation-point flow of nanofluids over a nonlinearly stretching/shrinking sheet in the presence of blowing/suction. The effects of different nanoparticle materials, namely copper, alumina and titania on the flow and heat transfer rate are investigated. Employing similarity variables, the governing partial differential equations including continuity, momentum and energy have been reduced to ordinary equations and are solved numerically via Runge-Kutta-Fehlberg scheme. It is shown that two solutions exist for shrinking sheets in both blowing and impermeable cases, while an additional solution appears in the case of suction (there are three solutions). Moreover, the effects of nonlinearly parameter β , blowing/suction S , and solid volume fraction ϕ on the heat and fluid flow characteristics are investigated in details.

      PubDate: 2017-09-10T12:43:06Z
      DOI: 10.1016/j.aej.2017.08.010
  • Effect of frictional heating on mixed convection flow of chemically
           reacting radiative Casson nanofluid over an inclined porous plate

    • Authors: C. Sulochana; G.P. Ashwinkumar; N. Sandeep
      Abstract: Publication date: Available online 5 September 2017
      Source:Alexandria Engineering Journal
      Author(s): C. Sulochana, G.P. Ashwinkumar, N. Sandeep
      The present study deals with the boundary layer analysis of a 2D magnetohydrodynamic flow of chemically reacting Casson nanofluid flow over a semi-infinite inclined porous plate. The energy and diffusion equation are encompassed with frictional heating, heat generation/absorption, thermo diffusion and thermal radiation effects. For making the analysis more attractive we pondered two distinct type of nanofluids namely, TiO2-water and CuO-water. The transmuted governing PDEs are resolved analytically by employing regular perturbation method. The impact of pertinent flow parameters on momentum, thermal and mass transport behavior including the skin friction factor, thermal and mass transport rate are examined and published with the assistance of graphical and tabular forms. Results describe that thermal radiation and chemical reaction restrictions have a propensity to enhance thermal and mass transport rates, respectively. And also, water based TiO2 nanofluid possess higher velocity compared with water based CuO nanofluids.

      PubDate: 2017-09-10T12:43:06Z
      DOI: 10.1016/j.aej.2017.08.006
  • Hermite wavelets operational matrix of integration for the numerical
           solution of nonlinear singular initial value problems

    • Authors: S.C. Shiralashetti; S. Kumbinarasaiah
      Abstract: Publication date: Available online 5 September 2017
      Source:Alexandria Engineering Journal
      Author(s): S.C. Shiralashetti, S. Kumbinarasaiah
      In this paper, new operational matrix of integration is generated by using Hermite wavelets. By aid of these matrices, Hermite wavelets operational matrix method (HWOMM) is developed for second ordered nonlinear singular initial value problems. Properties of Hermite wavelets are used to convert the differential equations into system of algebraic equations which can be efficiently solved by suitable solvers. Illustrative numerical problems are considered to demonstrate the applicability of the proposed technique and those results are comparing favourably with the exact solutions and errors.

      PubDate: 2017-09-10T12:43:06Z
      DOI: 10.1016/j.aej.2017.07.014
  • Analysis the optimum inlet air temperature for controlling homogeneous
           charge compression ignition (HCCI) engine

    • Authors: S. Gowthaman; A.P. Sathiyagnanam
      Abstract: Publication date: Available online 4 September 2017
      Source:Alexandria Engineering Journal
      Author(s): S. Gowthaman, A.P. Sathiyagnanam
      Homogeneous charge compression ignition engine is promising replacement for conventional CI diesel engine with lower oxides of nitrogen (NOx) and smoke emissions and improves the thermal efficiency with consume less amount of fuel. In general, HCCI engine operates with lean air/fuel charge for all operating condition, and it makes the HCCI combustion more complex and difficult to control the start of ignition point. The inlet air temperature is the primary parameter for controlling the HCCI combustion. In this study, the HCCI engine was operated at different inlet air temperatures as 90°C, 100°C, 110°C, 120°C, 130°C, 140°C and 150°C respectively. From this study, it was observed that the level of NOx emission increased with increasing the inlet air temperature and smoke emission was reduced with increasing the inlet charge temperature. The inlet air temperature about 120°C showed maximum reduction of smoke emission about 15HSU at 60% load. Similarly, CO and HC were reduced with increasing the inlet air temperature. The specific fuel consumption of HCCI mode engine decreased with increasing the inlet air temperature and the power output of the engine increased with increasing the suction air temperature.

      PubDate: 2017-09-10T12:43:06Z
      DOI: 10.1016/j.aej.2017.08.011
  • Optimization of Beam Shaping Assembly design for Boron Neutron Capture
           Therapy based on a transportable proton accelerator

    • Authors: Jacob G. Fantidis; G. Nicolaou
      Abstract: Publication date: Available online 4 September 2017
      Source:Alexandria Engineering Journal
      Author(s): Jacob G. Fantidis, G. Nicolaou
      The optimization of a Beam Shaping Assembly design for Boron Neutron Capture Therapy (BNCT), based on a commercial available proton accelerator, has been simulated. The primary goal is to improve the flux of the epithermal neutrons, which is the major drawback in all designed BNCT facilities with portable neutron source, satisfying simultaneously all the other relevant parameters. A BNCT facility has been simulated using the MCNP4B Monte Carlo code. A wide set of material were examined as moderators, while three different materials are used as fast neutron, gamma ray and thermal neutrons filters. Fast neutrons from 9Be(p,n)9B reaction are moderated through the 7LiF and TiF3 moderators and further reduced using 60Ni as fast neutron filter. The undesired gamma rays and thermal neutrons are removed using Bi and Cd filters respectively. The therapeutic efficacy of the proposed facility was calculated through the dosimetric evaluation in a head phantom. According to the results of the calculations the proposed unit satisfies the recommended by IAEA parameters. Only the flux of the epithermal neutrons remains below the recommended threshold, but is significantly improved.

      PubDate: 2017-09-10T12:43:06Z
      DOI: 10.1016/j.aej.2017.08.004
  • Emissions analysis on mahua oil biodiesel and higher alcohol blends in
           diesel engine

    • Authors: Arulprakasajothi Mahalingam; Yuvarajan Devarajan; Santhanakrishnan Radhakrishnan; Suresh Vellaiyan; Beemkumar Nagappan
      Abstract: Publication date: Available online 30 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Arulprakasajothi Mahalingam, Yuvarajan Devarajan, Santhanakrishnan Radhakrishnan, Suresh Vellaiyan, Beemkumar Nagappan
      High cetane number and energy content of octanol can be an excellent alternative fuels for existing diesel engines. It is necessary to have an extensive analysis on octanol asan additive in diesel engines. In this study neat mahua oil biodiesel is blended with different proportion of octanol in stationary diesel engine to observe its emission characteristics. Mahua oil biodiesel is prepared by conventional transesterification. The main aim of this study is to reduce various emissions of mahua oil biodiesel by appending octanol. This study discovered a significant reduction in all the emissions associated with mahua oil biodiesel by appending octanol at different proportions.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.009
  • Performance enhancement of steady-state Markov analysis for cognitive
           radio networks via channel reservation

    • Authors: Nehal M. El Azaly; Ehab F. Badran; M.R.M. Rizk; M. Amr Mokhtar
      Abstract: Publication date: Available online 30 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Nehal M. El Azaly, Ehab F. Badran, M.R.M. Rizk, M. Amr Mokhtar
      Cognitive radio wireless networks CRNs have been considered as an efficient communication paradigm to the utilization of scarce spectrum. The main purpose of channel reservation of dynamic spectrum access (DSA) is to access these idle channels intelligently which are specialized for primary users (PUS) to be used by unlicensed users temporarily, which are called secondary users (SUS) without causing critical interference to the licensed user’s activity. In this paper, continuous-time Markov chain paradigm is improved via channel reservation to show the best usage of the radio spectrum bands, and the transition matrix are deduced for the proposed model. Moreover, the probability state vector is proved by performing steady state analysis. The deduced expressions of the suggested model are illustrated in the numerical results section.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.08.002
  • The performance and stability of three-lobe journal bearing textured with
           micro protrusions

    • Authors: A.KH. EL-Said; B.M. EL-Souhily; W.A. Crosby; H.A. EL-Gamal
      Abstract: Publication date: Available online 30 August 2017
      Source:Alexandria Engineering Journal
      Author(s): A.KH. EL-Said, B.M. EL-Souhily, W.A. Crosby, H.A. EL-Gamal
      The present research work deals with studying the steady state performance and dynamic stability of sliding element hydrodynamic bearings of the three-lobe type and provided with a bushing surface textured with uniform micro protrusions. A mathematical model has been put forward for the problem using the Reynolds equation governing the unstable fluid lubrication inside the bearing as well as the equations governing the dynamic movement of the journal. The equations have been put in their numerical forms suitable for computer solution using the finite difference method. Two types of three lobe bearings have been considered, one with its plain bushing and the other with bushing textured with uniform micro protrusions. This is in addition to other two plain journal bearings one with plain bushing and the other with textured bushing. This is for the purpose of carrying out a general comparison to include the steady performance of these bearings in terms of their load carrying capacity and the friction losses in their parts in addition to their dynamic stability. It was concluded in the present work that the inclusion of these textured micro protrusions in the bushing of bearings, whether they are plain or of the three-lobe geometry improves their performance in terms of reducing their friction losses and raising their load carrying capacity along. It was found that the three-lobe bearing with protruded bushing surface texture is superior to the other types of bearings considered in the present work as far as steady state performance is concerned. Regarding the margin of stability to small sinusoidal disturbances the protruded three-lobe bearing shows a relatively lower margin. Some useful recommendations for future research work in this field of study are given in this work and the most important one is to carry out extensive experimental studies on sliding bearings surfaces fitted with textured bushings of different micro protrusions designs.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.08.003
  • Influence of plastic oil with ethanol gasoline blending on multi cylinder
           spark ignition engine

    • Authors: Vijaya Kumar Kareddula; Ravi Kumar Puli
      Abstract: Publication date: Available online 21 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Vijaya Kumar Kareddula, Ravi Kumar Puli
      Energy consumption is becoming the index of country development. Transportation sector is occupied the second position in total energy consumption. Traditional energy sources are obliterating out and leaving carbon foot prints on environment. Across the world plastic consumption and its disposal is increasing at exponential rate. The current research is aimed to utilize this plastic waste as an input for engine running in the form of plastic pyrolysis oil (PPO). Experiments are conducted with PPO on multi cylinder Maruti 800 petrol engine to evaluate the performance and emissions characteristics. The gasoline is blended with 15% PPO and with and without ethanol additive at 5%. The performance and emissions result of plastic oil blend is compared with pure petrol and ethanol added blend. The experimental outcomes clears, that the brake thermal efficiency of 15PPO is lower than that of pure petrol while the NOx emissions are substantially increased. Therefore, ethanol is added as an additive to control the NOx emissions, engine performance is improved compared to pure petrol and 15PPO. Emissions like CO, NOx are significantly controlled.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.015
  • A computational approach for the unsteady flow of maxwell fluid with
           Caputo fractional derivatives

    • Authors: Ehsan Ul Haque; Aziz Ullah Awan; Nauman Raza; Muhammad Abdullah; Maqbool Ahmad Chaudhry
      Abstract: Publication date: Available online 20 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Ehsan Ul Haque, Aziz Ullah Awan, Nauman Raza, Muhammad Abdullah, Maqbool Ahmad Chaudhry
      In this paper, the velocity field and the time dependent shear stress of Maxwell fluid with Caputo fractional derivatives in an infinite long circular cylinder of radius R is discussed. The motion in the fluid is produced by the circular cylinder. The fluid is initially at rest and at time t = 0 + , cylinder begins to oscillate with the velocity fsin ω t , due to time dependent shear stress acting on the cylinder tangentially. The hybrid technique used in this paper for the solution of the problem has less computational efforts and time cost as compared to other commonly used methods. The obtained solutions are in transformed domain, which are expressed in terms of modified Bessel functions I 0 ( · ) and I 1 ( · ) . The inverse Laplace transformation has been calculated numerically by using MATLAB package. The semi analytical solutions for Maxwell fluid with fractional derivatives are reduced to the similar solutions for Newtonian and ordinary Maxwell fluids as limiting cases. In the end, numerical simulations have been performed to analyze the behavior of fractional parameter α , kinematic viscosity ν , relaxation time λ , radius of the circular cylinder R and dynamic viscosity μ on our obtained solutions of velocity field and shear stress.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.012
  • Nonlinearity analysis in studying shallow grid foundation

    • Authors: A. Ibrahim; A. Dif; W. Othman
      Abstract: Publication date: Available online 20 August 2017
      Source:Alexandria Engineering Journal
      Author(s): A. Ibrahim, A. Dif, W. Othman
      Simulating shallow grid foundation resting on a homogenous C & ϕ soil by different nonlinear finite element analysis types, and estimate the foundation geometry effects on choosing the nonlinear analysis accuracy and degree, will be the main two concerned points through this paper. Almost of the nonlinearity classified agent techniques were mentioned briefly. Through studding the interaction between foundation and soil where the expected penetration may occurs, small and large deformation analysis was performed with a good comparison between their results for various loading levels. The soil material nonlinearity was defined by hardening plasticity cap model while elasticity model was chosen for the foundation. Then the tested variables for grid foundation were performed again on a systemized rectangular raft foundation to discuss contrasts in relative stress distribution inside the soil for the two varied foundation geometries. ABAQUS cae V.6.9.1 was the F.E Program simulation.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2016.11.021
  • Features based image registration using cross correlation and Radon

    • Authors: S. Chelbi; A. Mekhmoukh
      Abstract: Publication date: Available online 14 August 2017
      Source:Alexandria Engineering Journal
      Author(s): S. Chelbi, A. Mekhmoukh
      In many research fields, like Medical image analysis, pattern recognition, computer vision and remote sensed data processing, it is required to align the images. This article describes and compares two different methods to register images. In the first method, the Fourier Merlin transform based on the phase correlation of the two images in the Log-polar domain. However, it suffers from non-uniform sampling which makes it not suitable for applications causing losses in image information which will decrease the registration accuracy. The second method is to use the Radon transform proprieties to extract the rotation angle. Experiments show that the proposed method can detect the angle of rotation efficiently for different types of images without the SAR complex images.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.013
  • Numerical simulation of oscillating lid driven square cavity

    • Authors: Jagadeesh Varma Indukuri; Ranjith Maniyeri
      Abstract: Publication date: Available online 14 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Jagadeesh Varma Indukuri, Ranjith Maniyeri
      This paper aim to develop a two-dimensional computational model to study the fluid dynamic behaviour in a square cavity driven by an oscillating lid using staggered grid based finite volume method. Firstly the developed computational model is validated with that of other researcher’s results for the case of finite wall motion. Later the numerical simulations are performed for the case of top wall oscillations for various combinations of Reynolds number and frequencies. From these simulations an optimum frequency is chosen and then with the optimum frequency the simulations are carried out to explore the vortex behaviour for the cases of parallel wall oscillations (both top and bottom walls moving in the same direction) and anti-parallel wall oscillations (both top and bottom walls moving in the opposite direction). From these simulations it may be concluded that Re =1000 is medium range of operation for better mixing inside the cavity for the cases of parallel and anti-parallel wall oscillations.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.011
  • Achieving public participation in inaccessible areas using virtual reality
           a case study of Beit Hanoun – Gaza – Palestine

    • Authors: Fekry Fares; Dina Sameh Taha; Zeyad Tarek EL Sayad
      Abstract: Publication date: Available online 12 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Fekry Fares, Dina Sameh Taha, Zeyad Tarek EL Sayad
      The responsible authorities depend on public participation in decision-making. However, there are many obstacles facing them because of their reliance on traditional tools. These obstacles include that a large number of participants do not understand the tools of participation, as well as the inconsistency of time and place in which the participation process is taking place. This creates a gap between decision-makers and participants, all of which reduce the efficiency of participation. This research paper will study the use of virtual reality, using programs such as Vizard in the conduct of a participatory process by linking virtual reality and internet without restricting the participants with a particular place and time to carry out the process of participation, as well as the provision of tools to facilitate decision-making tools. Beit Hanoun (Gaza-Palestine) was selected to test the effectiveness of the tool used because it suffers from the efficiency of the tools available to participate in the city. The results show that the tool used to effectively integrate citizens into decision-making in a more interactive way can enhance communication between decision-makers and citizens. Virtual reality tools and the Internet are reliable tools in any study of the integration of citizens into decision-making.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.010
  • Impact of thermal radiation on electrical MHD flow of nanofluid over
           nonlinear stretching sheet with variable thickness

    • Authors: Yahaya Shagaiya Daniel; Zainal Abdul Aziz; Zuhaila Ismail; Faisal Salah
      Abstract: Publication date: Available online 12 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Yahaya Shagaiya Daniel, Zainal Abdul Aziz, Zuhaila Ismail, Faisal Salah
      The present paper addresses magnetohydrodynamics (MHD) flow of nanofluid towards nonlinear stretched surface with variable thickness in the presence of electric field. The analysis is presented with viscous dissipation, Joule heating, and chemical reaction. Characteristics of heat transfer are analyzed with the electric field and variable thickness phenomenon. The partial differential equations are converted into dimensionless ordinary differential equations by employing suitable transformations. Implicit finite difference scheme is implemented to solve the governing dimensionless problems. Behaviors of several sundry variables on the flow and heat transfer are scrutinized. Skin friction coefficient, the local Nusselt number local Sherwood number are presented and evaluated. It is observed that the skin friction, the rate of heat and mass transfer reduces with a rise in wall thickness. Electric field enhances the nanofluid velocity and temperature but reduced the concentration. Thermal radiation is sensitive to an increase in the nanofluid temperature and thicker thermal boundary layer thickness. Obtained results are also compared with the available data in the limiting case and good agreement is noted.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.007
  • Model level code smell detection using EGAPSO based on similarity measures

    • Authors: G. Saranya; H. Khanna Nehemiah; A. Kannan; V. Nithya
      Abstract: Publication date: Available online 7 August 2017
      Source:Alexandria Engineering Journal
      Author(s): G. Saranya, H. Khanna Nehemiah, A. Kannan, V. Nithya
      Software maintenance is an essential part of any software that finds its use in the day-to-day activities of any organization. During the maintenance phase bugs detected must be corrected and the software must evolve with respect to changing requirements without ripple effects. Software maintenance is a cumbersome process if code smells exist in the software. The impact of poor design is code smells. In code smells detection, majority of the existing approaches are rule based, where a rule represents the combination of metrics and threshold. In rule based approach, defining the rules that detect the code smells are time consuming because identifying the correct threshold value is a tedious task, which can be fixed only through trial and error method. To address this issue, in this work Euclidean distance based Genetic Algorithm and Particle Swarm Optimization (EGAPSO) is used. Instead of relying on threshold value, this approach detects all code smells based on similarity between the system under study and the set of defect examples, where the former is the initial model and the latter is the base example. The approach is tested on the open source projects, namely Gantt Project and Log4j for identifying the five code smells namely Blob, Functional Decomposition, Spaghetti Code, Data Class and Feature Envy. Finally, the approach is compared with code smell detection using Genetic Algorithm (GA), DEtection and CORrection (DECOR), Parallel Evolutionary Algorithm (PEA) and Multi-Objective Genetic Programming (MOGP). The result of EGAPSO proves to be effective when compared to other code smell detection approaches.

      PubDate: 2017-09-04T11:53:28Z
      DOI: 10.1016/j.aej.2017.07.006
  • A reliable method based on second kind Chebyshev polynomial for the
           fractional model of Bloch equation

    • Authors: Harendra Singh; C.S. Singh
      Abstract: Publication date: Available online 1 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Harendra Singh, C.S. Singh
      In this paper we present a reliable method based on second kind Chebyshev polynomial for the approximate solution of fractional Bloch equation in Nuclear Magnetic Resonance (NMR). The main advantages of the proposed method that it converts the fractional Bloch equation into a set of linear algebraic equations which relax the problem. Convergence and error analysis of the proposed method is given. The numerical results from suggested method and exiting methods are compared and it is observed that the results from suggested method are more accurate. Absolute errors and root mean square errors tables are given to show the accuracy of the proposed approximate method. Computational order is listed for proposed method in the form of the table. Graphs of approximate solutions are plotted by taking different time fractional derivatives.

      PubDate: 2017-08-05T00:37:57Z
      DOI: 10.1016/j.aej.2017.07.002
  • Pressure control for minimizing leakage in water distribution systems

    • Authors: Nourhan Samir; Rawya Kansoh; Walid Elbarki; Amr Fleifle
      Abstract: Publication date: Available online 1 August 2017
      Source:Alexandria Engineering Journal
      Author(s): Nourhan Samir, Rawya Kansoh, Walid Elbarki, Amr Fleifle
      In the last decades water resources availability has been a major issue on the international agenda. In a situation of worsening scarcity of water resources and the rapidly increasing of water demands, the state of water losses management is part of man’s survival on earth. Leakage in water supply networks makes up a significant amount, sometimes more than 70% of the total water losses. The best practices suggest that pressure management is one of the most effective way to reduce the amount of leakage in a water distribution system. The approach presented in this study is aimed at modeling leakage as a function of pressure and pipe length, calibrating leakage coefficient, using fixed pressure reducing valves (PRVs) to develop pressure fluctuation and developing WaterCAD scenarios to minimize leakage through the most effective settings of PRVs. This approach was applied on a district metered area (DMA) in Alexandria, Egypt. The application of this approach produced some encouraging results, where the leakage through DMA was dropped by 37% for the best scenario. Thus, this approach is recommended as a decision support tool for determining a desirable solution for leakage reduction.

      PubDate: 2017-08-05T00:37:57Z
      DOI: 10.1016/j.aej.2017.07.008
  • Multi-swarm multi-objective optimization based on a hybrid strategy

    • Authors: Shery Sedarous; Sherin M. El-Gokhy; Elsayed Sallam
      Abstract: Publication date: Available online 31 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Shery Sedarous, Sherin M. El-Gokhy, Elsayed Sallam
      Multi-objective optimization is a very competitive issue that emerges naturally in most real world problems. It is concerned with the optimization of conflicting objectives in multi-objective problems. The multi-objective problem treats with tradeoff solutions in order to satisfy all objectives. An extensive variety of algorithms has been developed to solve multi-objective optimization problems. In this paper, we presents a multi-swarm multi-objective intelligence-based algorithm enhanced with a hybrid strategy between decomposition and dominance (MSMO/2D) to improve convergence and diversity by splitting the primary swarm into a number of sub-swarms. The proposed algorithm is applied to fourteen standard problems and compared with two of the most familiar multi-objective optimization algorithms MOEA/D and D2MOPSO. The experimental results give evidence that the multi-swarm armed by the hybrid strategy constitutes a better alternative for multi-objective optimization problems.

      PubDate: 2017-08-05T00:37:57Z
      DOI: 10.1016/j.aej.2017.06.017
  • On the analysis of squeezing flow of nanofluid between two parallel plates
           under the influence of magnetic field

    • Authors: M.G. Sobamowo; A.T. Akinshilo
      Abstract: Publication date: Available online 29 July 2017
      Source:Alexandria Engineering Journal
      Author(s): M.G. Sobamowo, A.T. Akinshilo
      In this paper, squeezing flow of Cu-water and Cu kerosene under the influence of magnetic field with pressure gradient is studied using the regular perturbation method. The obtained analytical solutions are used to investigate the squeezing phenomena of the nanofluid when the plates are moving apart and when they are coming together. Also, the effects of the flow parameters such as nanoparticle concentration, Hartmann parameter and Eckert number are analyzed and discussed. The results of the analytical solutions as developed in this study are agreement with the results of the previous studies and the results of the numerical method using fourth-fifth order Runge-Kutta-Fehlberg method. The results in this work can be used to further study the squeezing flow in applications such as power transmission, polymer processing and hydraulic lifts.

      PubDate: 2017-08-05T00:37:57Z
      DOI: 10.1016/j.aej.2017.07.001
  • Natural convection in a rectangular enclosure filled by two immiscible
           fluids of air and Al2O3-water nanofluid heated partially from side walls

    • Authors: Mahmoud Salari; Emad Hasani Malekshah; Masoud Hasani Malekshah
      Abstract: Publication date: Available online 29 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Mahmoud Salari, Emad Hasani Malekshah, Masoud Hasani Malekshah
      This article presents numerical simulation results of natural convection of two immiscible gas/liquid fluids, air and Al2O3-water nanofluid, within a rectangular enclosure which was heated partially from side walls. The finite volume approach is used to solve the governing equations of momentum and energy. The SIMPLE algorithm is used to correlate between the velocity and pressure fields and satisfying the continuity equation. After validating the numerical method, the variations of the solid volume fraction of the nanofluid (0≤ϕ≤0.2), the Rayleigh number (103 ≤ Ra ≤106), the aspect ratio of the enclosure, the heater’s length and locations on side walls were studied in details, while the free surface level of the nanofluid was considered to be constant (Hnf =0.8H). The results show that the interface between two immiscible fluids exerts a different condition within the liquid region especially on the streamlines and the formation of circulating zones in corners.

      PubDate: 2017-08-05T00:37:57Z
      DOI: 10.1016/j.aej.2017.07.004
  • Thermal stress and deformation analysis of a size-dependent curved
           nanobeam based on sinusoidal shear deformation theory

    • Authors: Mohammad Arefi; Ashraf M. Zenkour
      Abstract: Publication date: Available online 29 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Mohammad Arefi, Ashraf M. Zenkour
      In this paper, the analytical approach for thermal stress and deformation analysis of a curved nanobeam is presented. The nanobeam is subjected to transverse mechanical and thermal loads while resting on Pasternak's foundation. Sinusoidal shear deformation theory is employed to derive displacement field of curved nanobeam. In addition, nonlocal thermo-elasticity relations are employed to derive governing equations of thermal analysis based on principle of virtual work. The analytical results are presented for simply-supported curved nanobeam to discuss the influence of important parameters on the results of thermal stress. The important parameters include spring and shear parameters of foundation, thermal loads, nonlocal parameter and radius of curvature of curved nanobeam. The results of our problem are applicable to design of curved nanobeams subjected to thermal and mechanical loads.

      PubDate: 2017-08-05T00:37:57Z
      DOI: 10.1016/j.aej.2017.07.003
  • Role-task conditional-purpose policy model for privacy preserving data

    • Authors: Rana Elgendy; Amr Morad; Hicham G. Elmongui; Ayman Khalafallah; Mohamed S. Abougabal
      Abstract: Publication date: Available online 23 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Rana Elgendy, Amr Morad, Hicham G. Elmongui, Ayman Khalafallah, Mohamed S. Abougabal
      Privacy becomes a major concern for both consumers and enterprises; therefore many research efforts have been devoted to the development of privacy preserving technology. The challenge in data privacy is to share the data while assuring the protection of personal information. Data privacy includes assuring protection for both insider ad outsider threats even if the data is published. Access control can help to protect the data from outsider threats. Access control is defined as the process of mediating every request to resources and data maintained by a system and determining whether the request should be granted or denied. This can be enforced by a mechanism implementing regulations established by a security policy. In this paper, we present privacy preserving data publishing model based on integration of CPBAC, MD-TRBAC, PBFW, protection against database administrator technique inspired from oracle vault technique and benefits of anonymization technique to protect data when being published using k-anonymity. The proposed model meets the requirements of workflow and non-workflow system in enterprise environment. It is based on the characteristics of the conditional purposes, conditional roles, tasks, and policies. It guarantees the protection against insider threats such as database administrator. Finally it assures needed protection in case of publishing the data.

      PubDate: 2017-07-26T14:12:05Z
      DOI: 10.1016/j.aej.2017.05.029
  • An efficient simulation of quantum error correction codes

    • Authors: R. Padma Priya; A. Baradeswaran
      Abstract: Publication date: Available online 14 July 2017
      Source:Alexandria Engineering Journal
      Author(s): R. Padma Priya, A. Baradeswaran
      The QCAD which has been technologically advanced during last few years to support basic transformations, simulating multi-dimensional quantum devices and circuits. It is most important to demonstrate the theoretical operation of quantum computer using the simulator. Besides of describing various noise models in terms of quantum gates, a direct support of quantum error correction codes. Using the quantum error correction codes, the effects of applying single bit or phase flip error to the quantum circuits are reported along with the error recovery method for different qubit codes. The results are generated using the QCAD simulator. A simulation model for evaluating single qubit error in the proposed quantum circuit is also given. The working software prototype of an extremely efficient quantum computer simulator which is an attractive and versatile tool for both research and education.

      PubDate: 2017-07-19T21:34:15Z
      DOI: 10.1016/j.aej.2017.06.013
  • Effective reduction of NOx emissions from diesel engine using split

    • Authors: R. Sindhu; G. Amba Prasad Rao; K. Madhu Murthy
      Abstract: Publication date: Available online 12 July 2017
      Source:Alexandria Engineering Journal
      Author(s): R. Sindhu, G. Amba Prasad Rao, K. Madhu Murthy
      Good fuel economy and high thermal efficiency of direct injection diesel engines are certainly welcome characteristics from the viewpoints of preserving energy sources and suppressing global warming. Despite the attractive fuel economy, high emissions of oxides of nitrogen (NOx) and particulate matter (PM) with their unresolved trade-off are a major challenge to be addressed by researchers. Downsizing of the engine, dilution using exhaust gases, retardation of injection timing, etc. are widely adopted techniques to lower NOx emissions. Of late, multiple/split injection strategy is garnering much attention from the researchers for its potential to effectively address NOx, soot and piston work trade-offs. The effects of variation of fuel injection timing, dilution using EGR are investigated and compared against the proposed technique of split injections (25/75 and 75/25) on a single cylinder diesel engine using numerical experiments in the present work. For this purpose, a quasi-dimensional model has been developed primarily using the derivations of first law of thermodynamics and ideal gas equation. Models predicting heat release rates, heat transfer losses, ignition delay, chemistry of combustion, NOx and soot formations are coupled to the model using phenomenological considerations. Split injection with a smaller quantity of fuel injected in the first pulse is observed to significantly lower NOx emissions due to the restrain in premixed phase of combustion of second pulse. Split injections are observed to effectively address NO-piston work trade-off compared to increasing dilution rates using EGR and retarding injection timing towards TDC.

      PubDate: 2017-07-19T21:34:15Z
      DOI: 10.1016/j.aej.2017.06.009
  • Cubic B-splines collocation method for a class of partial
           integro-differential equation

    • Authors: M. Gholamian; J. Saberi-Nadjafi
      Abstract: Publication date: Available online 12 July 2017
      Source:Alexandria Engineering Journal
      Author(s): M. Gholamian, J. Saberi-Nadjafi
      In this paper, a numerical method is proposed to estimate the solution of initial-boundary value problems for a class of partial integro-differential equations. This is based on the cubic B-splines method for spatial derivatives while the backward Euler method is used to discretize the temporal derivatives. Detailed discrete schemes are investigated. Next, we proved the convergence and the stability of the proposed method. The method is applied to some test examples and the numerical results have been compared with the exact solutions. The obtained results show the computational efficiency of the method. It can be concluded that computational efficiency of the method is effective for the initial-boundary value problems.

      PubDate: 2017-07-19T21:34:15Z
      DOI: 10.1016/j.aej.2017.06.004
  • A simplified 2½-degree of freedom time-domain model with non-linearity
           for the simulation of parametric roll

    • Authors: Tamer M. Ahmed
      Abstract: Publication date: Available online 12 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Tamer M. Ahmed
      In this paper, a simplified 2½-degree of freedom time-domain numerical method with non-linearity is developed, presented in detail and validated for simulating parametric roll. The method is termed 2½-degree of freedom since; it first linearly couples heave and pitch via a three-dimensional frequency-domain pulsating source method. The roll equation of motion is – then – solved in the time domain with, non-linear damping and non-linear parametric excitation taken into account and formulated in terms of heave-pitch-wave profile influence on roll. In other words, heave and pitch motions influence roll but roll motion does not influence heave and pitch back hence, the term 2½-degree of freedom. The mathematical formulation of the proposed method is presented in detail and has been developed into an in-house numerical model. Subsequently, the numerical model is applied to a modern container ship. Experimental results from the literature are utilized for validation. Predicted results show very good agreement with experiments and demonstrate the ability of the proposed method to accurately capture the influence of various parameters affecting parametric roll.

      PubDate: 2017-07-19T21:34:15Z
      DOI: 10.1016/j.aej.2017.06.015
  • Effect of thermal radiation and MHD on non-Newtonian third grade fluid in
           wire coating analysis with temperature dependent viscosity

    • Authors: Zeeshan Khan; Rehan Ali Shah; Mohammad Altaf; Saeed Islam; Aurangzeb Khan
      Abstract: Publication date: Available online 8 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Zeeshan Khan, Rehan Ali Shah, Mohammad Altaf, Saeed Islam, Aurangzeb Khan
      This article describes the effect of thermal radiation on the non-Newtonian third grade fluid used as a coating material for wire coating analysis with temperature dependent viscosity. The basic governing equations of continuity, momentum and energy are incorporated. The effect of thermal radiation and viscous dissipation terms are included in the energy equation. The Reynolds and Vogel’s models have been considered for temperature dependent viscosity. The approximate solution is obtained by HAM (homotopy analysis method). The approximate solution is compared with the numerical solution obtained by ND-Solve method. The effect of different parameters involved in the solution such as non-Newtonian parameter β, Reynolds model viscosity parameter χ, Vogel’s model viscosity parameter Ω, thermal radiation parameter R and Brinkman number Br is discussed in detail. It is observed that the non-Newtonian property β of the fluid is favorable for increasing the velocity and temperature distribution. The magnetic parameter M increases the temperature. The viscosity parameters χ and Ω decrease the velocity of the fluid while the temperature profile increases. An increase in the thermal radiation parameter R and Brinkman number Br accelerate the velocity and temperature of the melt polymer so as to make the process faster.

      PubDate: 2017-07-19T21:34:15Z
      DOI: 10.1016/j.aej.2017.06.003
  • Characteristics of Joule heating and viscous dissipation on
           three-dimensional flow of Oldroyd B nanofluid with thermal radiation

    • Authors: K. Ganesh Kumar; G.K. Ramesh; B.J. Gireesha; R.S.R. Gorla
      Abstract: Publication date: Available online 3 July 2017
      Source:Alexandria Engineering Journal
      Author(s): K. Ganesh Kumar, G.K. Ramesh, B.J. Gireesha, R.S.R. Gorla
      Present study explores the discussion on combined effects of Joule heating and viscous dissipation on a three-dimensional flow of Oldroyd B nanofluid. The model describes that flow is generated by bidirectional stretching sheet with thermophoresis and Brownian motion effects and also energy equation contain radiation term. Converted self similar equations are solved via shooting algorithm with RKF 45 method. The influences of Joule heating and viscous dissipation are discussed through graphs. It is noticed that combination of Joule and viscous heating, the temperature of Oldroyd B nanofluid profile increases.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.006
  • Koch boundary on the square patch microstrip antenna for ultra wideband

    • Authors: Manisha Gupta; Vinita Mathur
      Abstract: Publication date: Available online 3 July 2017
      Source:Alexandria Engineering Journal
      Author(s): Manisha Gupta, Vinita Mathur
      In this paper a novel compact microstrip feed square patch antenna with right angled isosceles Koch fractal geometry on its edges is designed for ultra wideband applications. The radiating patch is modified in several steps to achieve a multiband circularly polarized antenna. The fractal antenna is simulated using CST Microwave Studio Simulator. Antenna’s performance is then compared with equilateral Koch, Minkowski and Sierpinski fractal geometries. The suggested antenna is assembled on FR4-epoxy (εr =4.4) substrate with dimensions 60×55×1.59mm3. The developed antenna efficiently operates at 4.3GHz, 5.0GHz, 6.1GHz, 7.4GHz, 8.9GHz and 9.2GHz. Circular polarizations are achieved near four resonant frequencies, which are realized by adding a circle in the middle of the patch. The presented antenna has a good gain, bandwidth, VSWR and axial ratio bandwidth. In this paper, an approach for multiband antennas is proposed. The novelty of the paper lies in the fact that a right angled triangular Koch curve is formed on the edges of the square patch.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.005
  • Experimental study of effect of isobutanol in performance, combustion and
           emission characteristics of CI engine fuelled with cotton seed oil blended

    • Authors: V. Mathan Raj; L.R. Ganapathy Subramanian; G. Manikandaraja
      Abstract: Publication date: Available online 3 July 2017
      Source:Alexandria Engineering Journal
      Author(s): V. Mathan Raj, L.R. Ganapathy Subramanian, G. Manikandaraja
      There are many alternate fuels such as biodiesel and alcohols which has been commercialized in the industrial sector as well as in the transportation sector. In this context, cottonseed oil and isobutanol renewed our interest. Experiments are carried out on the single cylinder four strokes diesel engine capable of producing the power output of 5.2kW and test is carried at the speed of 1500rpm and under varying the load condition for the blends of cottonseed oil and isobutanol with diesel prepared by the volume basis i.e., B10, B10+5%, B10+10%, B20, B20+5% and B20+10%. The result shows that the addition of cottonseed oil increases the brake thermal efficiency with the reduction in the specific fuel consumption and exhaust gas temperature. Increasing the amount of the cottonseed oil in the blend also reduces the emission parameter such as CO, CO2, NOX and O2 with increase in HC emission. The addition of the isobutanol in the cottonseed oil blend diesel fuel has similar effect to that of addition of pure cottonseed oil in varying proportion that increases the brake thermal efficiency with the reduction in the specific fuel consumption and exhaust gas temperature.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.007
  • Two-mode coupled Burgers equation: Multiple-kink solutions and other exact

    • Authors: H.M. Jaradat
      Abstract: Publication date: Available online 3 July 2017
      Source:Alexandria Engineering Journal
      Author(s): H.M. Jaradat
      In this paper, we establish a new two-mode coupled Burgers equation (TMCBE). The necessary conditions that make the multiple kink solutions and the multiple singular kink solutions to TMCBE exist are founded using the simplified bilinear method. Moreover, we find other exact solutions using the hyperbolic-expansion method such as the sech-csch method, the tanh-coth method, and the sinh-cosh method to conduct this study. Finally, this coupled is new and all results obtained didn’t exist in any other work prior to this paper.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.014
  • Neural based hybrid metaheuristic technique for computing rotating
           transport of Falkner-Skan flow

    • Authors: Z. Iqbal; Ehtsham Azhar; Zaffar Mehmood; Mirza Muhammad Sabir
      Abstract: Publication date: Available online 30 June 2017
      Source:Alexandria Engineering Journal
      Author(s): Z. Iqbal, Ehtsham Azhar, Zaffar Mehmood, Mirza Muhammad Sabir
      In present analysis we are focused on neural based hybrid metaheuristic technique for computing rotating transport of Falkner-Skan flow. We incorporate modeling of present problem using artificial neural network (ANN). An approximate model of the equation in an unsupervised manner is built to subjugate effectiveness of ANN. Stochastic solvers based on hybrid approach are used to verify the accuracy of the designed scheme. The hybrid metaheuristic scheme involves genetic algorithm (GA) along with interior point algorithm (IPA) for the training and weights optimization of ANN. The proposed scheme is evaluated for Falkner-Scan boundary value problem by taking different values of material and rotation parameters. Moreover, comparative studies of the proposed solution are made with standard numerical algorithm in order to establish reliability of present neural based hybrid metaheuristic technique.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.011
  • A novel local skew correction and segmentation approach for printed
           multilingual Indian documents

    • Authors: Narasimha Reddy Soora; Parag S. Deshpande
      Abstract: Publication date: Available online 30 June 2017
      Source:Alexandria Engineering Journal
      Author(s): Narasimha Reddy Soora, Parag S. Deshpande
      Till date, many Indian government organizations do not have robust software to search for words from scanned office documents having complex multilingual Indian scripts. Manual search of such a multilingual Indian document will take few minutes and there will be tens of thousands of documents to be searched for the desired content. Manual search of such a huge number of scanned Indian documents will be tedious, which requires robust automatic searching software. This led us to work toward indexing of aged printed multilingual Indian office documents. This paper presents a novel geometrical technique to group the components which belong to a text line of a document having multi-orientations and a novel approach to find the local skew of Devanagari word. The performance of the proposed technique was evaluated using 280 printed Indian documents with around 6000 text lines having English, Devanagari, and Marathi scripts and achieved 99% success rate for line segmentation indicates the legitimacy of the proposed method. To further assess the performance of the proposed method, we have considered publicly available Tobacco800 document image database and achieved significant performance results as compared with few of the prominent methods from the literature.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.010
  • Differential transform method for unsteady nanofluid flow and heat

    • Authors: Muhammad Usman; Muhammad Hamid; Umar Khan; Syed Tauseef Mohyud Din; Muhammad Asad Iqbal; Wei Wang
      Abstract: Publication date: Available online 26 June 2017
      Source:Alexandria Engineering Journal
      Author(s): Muhammad Usman, Muhammad Hamid, Umar Khan, Syed Tauseef Mohyud Din, Muhammad Asad Iqbal, Wei Wang
      In this article, unsteady two phases of nanofluid flow and heat transfer between moving parallel plates in the presence of the magnetic field were tackled by Differential transform method (DTM). System of ordinary differential equations was obtained using the similarity transformation. Comparison with numerical method Runge-Kutta of order four specifies that Differential transform method is very applicable to solve these problems. We investigate the numerical results of different values of parameters e.g. the squeeze number, Eckert number and Hartmann number. This sort of results can help the engineers to create higher and researchers to analyze quicker and easier.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.03.052
  • A comparative analysis of magnetohydrodynamic non-Newtonian fluids flow
           over an exponential stretched sheet

    • Authors: M. Sathish Kumar; N. Sandeep; B. Rushi Kumar; P.A. Dinesh
      Abstract: Publication date: Available online 23 June 2017
      Source:Alexandria Engineering Journal
      Author(s): M. Sathish Kumar, N. Sandeep, B. Rushi Kumar, P.A. Dinesh
      This study is dedicated to figure out the flow, thermal and concentration boundary layer nature of Casson and Carreau fluids over an exponential stretching surface with zero normal flux of nanoparticles having magnetic behavior. Moreover, consideration of nanoparticles which are passively control at the surface is physically more realistic condition (Buongiorno model). Adequate similarity transforms are invoked to put the flow governing equations in dimensionless form. Then after, the transformed equations are solved by means of an effective Runge-Kutta based shooting method. The influence of the selected flow managing parameters on the usual profiles viz. velocity, thermal and concentration are inspected comprehensively with the aid of plots. Numerical treatment for friction factor and reduced Nusselt number is presented in tabular form. It is noticed that Carreau fluid is highly affected by the Lorentz force when equated with the Casson fluid.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.002
  • Buckling analysis of nonuniform nonlocal strain gradient beams using
           generalized differential quadrature method

    • Authors: H. Bakhshi Khaniki; Sh. Hosseini-Hashemi; A. Nezamabadi
      Abstract: Publication date: Available online 23 June 2017
      Source:Alexandria Engineering Journal
      Author(s): H. Bakhshi Khaniki, Sh. Hosseini-Hashemi, A. Nezamabadi
      Recently, it was shown that the length scales presented in nonlocal elasticity and strain gradient theory each describe a different physical and material properties of structures at small scales. Accordingly, in this article, by using the new accurate nonlocal strain gradient theory, buckling behavior of nonuniform small-scale beam is investigated. Nanobeam is assumed with variable cross section through the length by exponentially varying the width. According to the size effects, higher order strain deformations and nonlocal effects are modeled on the Euler-Bernoulli beam. Governing equation of motion is presented using Hamilton's principle for nonuniform nonlocal strain gradient beams and solved using generalized differential quadrature method for higher order differential equations. Accuracy of the current methodology is discussed by increasing the number of sampling points and merging to unique solutions. Moreover, in order comprehend the nonuniformity effects on nonlocal strain gradient beams, parametric study is done and presented for different variables. It is shown that nonuniformity could have a significant efficacy on critical buckling loads depending on the ratio between nonlocal and strain gradient parameters. This study is a step forward in better understanding the behavior of nonuniform small scale beams to be used in different nanoscale structures.

      PubDate: 2017-07-03T23:10:04Z
      DOI: 10.1016/j.aej.2017.06.001
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