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    - ENGINEERING (1194 journals)
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    - MECHANICAL ENGINEERING (85 journals)

ENGINEERING (1194 journals)            First | 1 2 3 4 5 6 7 8 | Last

Dams and Reservoirs     Hybrid Journal   (Followers: 4)
Data Handling in Science and Technology     Full-text available via subscription   (Followers: 4)
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 23)
Designed Monomers and Polymers     Hybrid Journal   (Followers: 2)
Designs, Codes and Cryptography     Hybrid Journal   (Followers: 9)
Developments in Clay Science     Full-text available via subscription  
Developments in Geotechnical Engineering     Full-text available via subscription   (Followers: 3)
Developments in Mineral Processing     Full-text available via subscription   (Followers: 2)
Diálogos Interdisciplinares     Open Access  
Diamond Light Source Proceedings     Full-text available via subscription  
Diffusion Foundations     Full-text available via subscription  
Digital Signal Processing     Hybrid Journal   (Followers: 12)
Discrete Optimization     Full-text available via subscription   (Followers: 5)
Doct-Us Journal     Open Access  
Documents pour l'histoire des techniques     Open Access   (Followers: 1)
Dyes and Pigments     Hybrid Journal   (Followers: 3)
Dyna     Open Access  
Dynamical Systems : An International Journal     Hybrid Journal   (Followers: 1)
E&S Engineering and Science     Open Access  
El Hombre y la Máquina     Open Access  
Electromagnetics     Hybrid Journal   (Followers: 2)
Electrophoresis     Hybrid Journal   (Followers: 6)
Elementos     Open Access  
Elsevier Geo-Engineering Book Series     Full-text available via subscription   (Followers: 3)
Elsevier Ocean Engineering Series     Full-text available via subscription   (Followers: 1)
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 25)
Energies     Open Access   (Followers: 3)
Energy and Power Engineering     Open Access   (Followers: 14)
Energy Conversion and Management     Hybrid Journal   (Followers: 10)
Energy Engineering     Full-text available via subscription   (Followers: 9)
Energy for Sustainable Development     Hybrid Journal   (Followers: 9)
Energy Procedia     Open Access   (Followers: 4)
Energy Science & Engineering     Open Access   (Followers: 5)
Energy Science and Technology     Open Access   (Followers: 14)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects     Hybrid Journal   (Followers: 2)
Energy Sources, Part B: Economics, Planning, and Policy     Hybrid Journal   (Followers: 7)
Energy Systems     Hybrid Journal   (Followers: 14)
ENGEVISTA     Open Access   (Followers: 1)
ENGI : Revista Electrónica de la Facultad de Ingenieria     Open Access  
Engineer : Journal of the Institution of Engineers, Sri Lanka     Open Access  
Engineering     Open Access   (Followers: 2)
Engineering     Open Access   (Followers: 1)
Engineering & Technology     Hybrid Journal   (Followers: 20)
Engineering Analysis with Boundary Elements     Hybrid Journal   (Followers: 1)
Engineering Computations     Hybrid Journal   (Followers: 4)
Engineering Economics     Open Access   (Followers: 4)
Engineering Economist, The     Hybrid Journal   (Followers: 3)
Engineering Education     Open Access   (Followers: 1)
Engineering Failure Analysis     Hybrid Journal   (Followers: 43)
Engineering Geology     Hybrid Journal   (Followers: 8)
Engineering International     Open Access  
Engineering Journal     Open Access   (Followers: 1)
Engineering Management Journal     Hybrid Journal   (Followers: 14)
Engineering Management Research     Open Access   (Followers: 5)
Engineering Management Reviews     Open Access   (Followers: 1)
Engineering Optimization     Hybrid Journal   (Followers: 8)
Engineering Science and Technology, an International Journal     Open Access  
Engineering Sciences     Open Access  
Engineering Studies     Hybrid Journal  
Engineering With Computers     Hybrid Journal   (Followers: 5)
Engineering, Technology & Applied Science Research     Open Access   (Followers: 1)
Entramado     Open Access  
Entropy     Open Access   (Followers: 3)
Environmental & Engineering Geoscience     Full-text available via subscription   (Followers: 2)
Environmental and Ecological Statistics     Hybrid Journal   (Followers: 6)
Environmetrics     Hybrid Journal  
Épités - Épitészettudomány     Full-text available via subscription   (Followers: 1)
EPJ Photovoltaics     Open Access   (Followers: 2)
Épsilon     Open Access  
Ergonomics in Design: The Quarterly of Human Factors Applications     Hybrid Journal   (Followers: 11)
ESAIM: Control Optimisation and Calculus of Variations     Full-text available via subscription  
ESAIM: Mathematical Modelling and Numerical Analysis     Full-text available via subscription   (Followers: 3)
ESAIM: Proceedings     Open Access  
Estuaries and Coasts     Hybrid Journal   (Followers: 15)
European Journal of Combinatorics     Full-text available via subscription   (Followers: 3)
European Journal of Engineering Education     Hybrid Journal   (Followers: 3)
European Journal of Lipid Science and Technology     Hybrid Journal   (Followers: 1)
European Journal of Mass Spectrometry     Full-text available via subscription   (Followers: 13)
European Medical Device Technology     Full-text available via subscription   (Followers: 4)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 6)
European Transport Research Review     Open Access   (Followers: 23)
Evolutionary Intelligence     Hybrid Journal  
Evolving Systems     Hybrid Journal   (Followers: 1)
Exacta     Open Access  
Experimental Techniques     Hybrid Journal   (Followers: 48)
Experiments in Fluids     Hybrid Journal   (Followers: 9)
Fibers and Polymers     Full-text available via subscription   (Followers: 3)
Filtration & Separation     Full-text available via subscription   (Followers: 5)
Finite Fields and Their Applications     Full-text available via subscription   (Followers: 3)
Fire Science Reviews     Open Access   (Followers: 6)
First Monday     Open Access   (Followers: 61)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 1)
Flow, Turbulence and Combustion     Hybrid Journal   (Followers: 21)
Fluid Dynamics     Hybrid Journal   (Followers: 6)
Fluid Dynamics Research     Full-text available via subscription   (Followers: 8)
Fluid Phase Equilibria     Hybrid Journal   (Followers: 4)
Focus on Catalysts     Full-text available via subscription   (Followers: 1)
Focus on Pigments     Full-text available via subscription   (Followers: 3)
Focus on Powder Coatings     Full-text available via subscription   (Followers: 3)
Focus on Surfactants     Full-text available via subscription   (Followers: 4)

  First | 1 2 3 4 5 6 7 8 | Last

Journal Cover Engineering Journal
  [SJR: 0.269]   [H-I: 16]   [1 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0125-8281 - ISSN (Online) 0125-8281
   Published by Chulalongkorn University Homepage  [1 journal]
  • Effect of the Molten Metal Stream’s Shape on Particle Size
           Distribution of Water Atomized Metal Powder

    • Authors: Suchart Yenwiset, Tawichart Yenwiset
      Abstract: The current knowledge indicated that water pressure, molten metal temperature, water flow rate and water jet configuration are very important factors which affect on the particle size distribution and shapes of atomized powder. This study aimed to investigate whether the shape of molten affects the particle size of atomized powder. The experiments were the production of copper powder with the fixed atomization process conditions, but varied the shape of molten metal by using two different shapes of tundish nozzle’s orifice to make the round and rectangular cross section of molten metal stream. There were three sizes for each orifice shape to determine the rate of production (metal flow rate) at 13 kg/min, 19 kg/min and 26 kg/min. The results showed that at the same flow rate of molten metal the production of flat metal stream from rectangular orifice made higher yield of finer particle, smaller median size (D50) and narrower range of size distribution than the production with the round cross section orifice for every production rates.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Facile Hydrothermal Synthesis of Zeolitic ANA Membrane from Raw Kaolin

    • Authors: Thapanee Khumbudda, Aphiruk Chaisena, Kunwadee Rangsriwatananon
      Abstract: The present paper reported a preparation of zeolitic ANA (analcime) membrane on porous ceramic support by in situ synthesis method using raw kaolin as SiO2 and Al2O3 source with the molar composition of Al2O3 ∙ 2.3SiO2 ∙ 3.6Na2O ∙ 140.4H2O at hydrothermal temperature 200 ºC. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the ANA membrane. The effects of aging time and hydrothermal time on the synthesis were investigated. The porous ceramic supports were prepared by adding 10.0 wt% of cristobalite and varying an amount of pore formers (activated carbon and calcite) by sintering at 1400 ºC. This resulted in the high crystallinity of ANA observed on the support which was prepared from mixing of 2.5 wt% of activated carbon and 2.5 wt% of calcite. In addition to aging, it was observable that small crystals seemed to spread completely on the support within 3 days of aging. It seems that the longer the hydrothermal time is, the more obvious the crystals tightly bound with the support becomes.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Numerical Study of the Oregonator Models on the Basis of the Two-Phase
           Rozenbrock’s Method with Complex Coefficients

    • Authors: Rustam Djamolovich Ikramov, Svetlana Anatolievna Mustafina
      Abstract: Chemical transformations typically occur according to multiphase schemes. Changes in the concentrations of the starting materials and intermediates with time are not always described with increasing or decreasing functions. A detailed study of a complex process kinetics showed that at the presence of feedback far from equilibrium there may occur vibrational modes - periodic increase or decrease in the concentration of one of the components in time. In a numerical study of oscillating reactions there appears a problem in solving a rigid system of typical differential equations. The purpose of this study is to develop an algorithm and a program to solve the direct kinetic problem and to investigate multicomponent chemical systems with complex nonlinear dynamics.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Hydraulics, Dimensional Analysis and Visualization of Flow through
           Unpressurized Gating Systems Using Water Models

    • Authors: Venkataramani Jaiganesh, Kalakkath Prakasan
      Abstract: During recent years, foundry industry has witnessed an increasing awareness about the importance of the filling stage for the production of metallurgically sound and dimensionally stable castings. The metallurgical soundness of a casting is strongly influenced by the way the liquid metal flows through various parts of the gating system and fills the mould cavity. Owing to the importance of filling stage, extensive research has been directed towards the determination of optimum filling conditions as well as on the influence of gating parameters. In this study, the hydraulics and flow behaviour of an aluminium alloy in a pressurized, horizontal gating system with a gating ratio of 1:2:1 incorporating multiple ingates attached to a horizontally cast plate mould is investigated using transparent water models. Similitude considerations between water and aluminium were invoked in the design of water models so that the conclusions drawn from water model experiments become applicable to real casting. Runners with two different aspect ratios and four different types of ingates were examined for their influence on hydraulics and flow behaviour. Flow behaviour was visualized using a high speed camera capable of capturing images up to 10,000 frames per second. Comparison of the filling patterns between water model experiments and real time experiments with molten metal in sand moulds provided useful insights into the performance of pressurized, horizontal gating system with multiple ingates and on the utility of flow visualization using water models.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Performance Analysis of Adaptive Location Update Schemes for Continuous
           Cell Zooming Algorithm in Wireless Networks

    • Authors: Khin Cho Tun, Kunagorn Kunavut
      Abstract: To reduce the transmitted power of base stations in mobile wireless networks, continuous cell zooming algorithm is a feasible dynamic cell zooming algorithm. In this algorithm, location management is required in order to know the locations of users. Movement-based Update is not compatible and the application of Convention Periodic Update (CPU) scheme in continuous cell zooming algorithm can lead to a high signaling cost. Thus, aiming to highlight the effectiveness of newly proposed location update schemes, Time-Adaptive Periodic Update (TAPU) and Location-Adaptive Periodic Update (LAPU), a simulation-based performance analysis is conducted. Applying in continuous cell zooming algorithm, the performances of TAPU and LAPU are compared to that of Convention Periodic Update (CPU) scheme in terms of transmitted power ratio, outage ratio and the number of update messages. The performances of TAPU and LAPU are analyzed in a network with different number of users and in a network with different average moving speeds of users. The results show that compared to CPU, both TAPU and LAPU have no significant effect on power saving capability of continuous cell zooming algorithm in every scenario. Meanwhile, LAPU and TAPU give a significant reduction of update messages in every scenario. In terms of QoS effect, LAPU gives approximately the same outage ratio as CPU and a higher outage ratio occurs in TAPU.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Sensitivity Analysis of Coastal Flooding to Geographical Factors:
           Numerical Model Study on Idealized Beaches

    • Authors: Chanyut Kalakan, Anurak Sriariyawat, Sittichai Naksuksakul, Thamnoon Rasmeemasmuang
      Abstract: This study evaluated the potential of coastal trees to reduce flooding areas caused by waves with abnormal heights, such as storm surges, using a numerical model applied to idealized beaches. The study considered 5 factors that affect sensitivity of coastal areas to flooding: slope of the beach, bottom friction coefficient, length of tree lines, width of tree lines, and shape of tree areas. The results indicate that slope of the beaches can reduce flooding areas, as steep slopes can transform wave energy into potential energy. With regard to the friction coefficient, beaches with higher bottom friction factors will have fewer flooding areas. Relative to beaches with no trees at all, increasing the length and width of tree lines can reduce flooding areas by as much as 30%. However, the shapes of tree areas have no significant effect on flooding areas.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Two-Dimensional Mathematical Modeling of the Oxidative Coupling of Methane
           in a Membrane Reactor

    • Authors: Wisitsree Wiyaratn, Salamah Manundawee, Amornchai Arpornwichanop, Suttichai Assabumrungrat, Anucha Watanapa, Chidporn Worawimut
      Abstract: The oxidative coupling of methane (OCM) in a dense BSCFO membrane reactor (MR) was theoretically studied using a two-dimensional reactor model. The simulation results indicated that increasing the operating temperature results in increased CH4 conversion and decreased C2 selectivity. An increase in the methane feed flow rate lowers the CH4 conversion but increases the C2 selectivity; however, the effect of the air flow rate on the OCM membrane reactor exhibits an opposite trend. The optimum configuration of the dense BSCFO-MR to provide the best performance was 0.018 m in diameter and 0.2 m in length at a GHSV of 38904.54 h-1 and temperature of 1073 K. Under these optimal conditions, the CH4 conversion is 43.713 %, the C2 selectivity is 61.352 % and the C2 yield is 26.82 %.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • A Numerical Investigation of the Temperature Uniformity of a Billet due to
           Thermal Radiation in a Reheating Furnace

    • Authors: Tanawat Khoukit, Chittin Tangthieng
      Abstract: In Thailand, the iron and steel industry is one of the major industries to provide raw materials to other ones. In order to heat a billet to a proper temperature, it is fed into a reheating furnace, which generates heat by the combustion of fuel from direct-fired burners. After the temperature uniformity of the billet is achieved, it will be sent to the rolling process. The major mechanism of heat transfer in the reheating furnace is the thermal radiation because of the high combustion gas temperature. The temperature distribution of a billet subjected to the thermal radiation of the enclosure surfaces in a reheating furnace is presented in this study. The 2-D steady-state heat conduction equation is numerically solved by the finite volume method together with the Gauss-seidel iterative technique. A qualitative agreement between the numerical result and the data from filed measurement is presented. The variations of the temperature uniformity of the billet with different insulation thicknesses, flame temperatures and furnace floor temperatures are investigated. The result indicates the hot spot at the middle of billet originated from the position of combustion flame. When the wall insulation thickness is decreased, the thermal radiation of combustion flame is decreased, leading to the higher degree of the temperature uniformity of the billet. In case of the lower flame temperature or the higher the floor temperature, the degree of the temperature uniformity of the billet also increases.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Using Czech TCT to Access Safety Impact of Deceleration Lane at Thai

    • Authors: Inder Pal Meel, Dussadee Satirasetthavee, Kunnawee Kanitpong, Pichai Taneerananon
      Abstract: The purpose of this study is to evaluate the safety impact of the deceleration lane at the Upstream Zone of at-grade U-turns on 4-lane divided highways of Thailand. A substantial speed reduction is required by the vehicles for diverging and making U-turn, and the deceleration lanes are provided for this purpose. These are also provides a storage space for the U-turning vehicle to avoid unnecessary blockage of the through lanes and reduce the potential of rear-end collisions. The safety at the U-turn is greatly influenced by the proper or improper uses of the deceleration lanes. Depending on their length, not only either the full or partial speed adjustment can occur within the deceleration lane also it influence the road users’ behavior. To assess the safety impact, the four groups of U-turns with the varying length of deceleration lanes were identified. Due to the limitations of availability and reliability of road crash data in Thailand a surrogate approach, based on traffic conflict was adopted for the study. Although the Traffic Conflict Technique (TCT) is widely accepted as an alternative and proactive approach but subjective nature of its parameters is debatable since its origin. The U-turns’ geometric data, traffic conflicts and volume data were recorded in the field. The Severity Conflict Rate (SCR) is assessed by applying weighing factor (based on severity grades according to the Czech TCT) to the observed conflicts exposed to the conflicting traffic volumes. A comparative higher value of SCR represents a lower level of traffic safety at a U-turn facility and a significant relationship was obtained between the length of deceleration lanes of the U-turns and the level of road traffic safety.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Evolution Toward 5G Mobile Networks – A Survey on Enabling

    • Authors: Rony Kumer Saha, Poompat Saengudomlert, Chaodit Aswakul
      Abstract: In this paper, an extensive review has been carried out on the trends of existing as well as proposed potential enabling technologies that are expected to shape the fifth generation (5G) mobile wireless networks. Based on the classification of the trends, we develop a 5G network architectural evolution framework that comprises three evolutionary directions, namely, (1) radio access network node and performance enabler, (2) network control programming platform, and (3) backhaul network platform and synchronization. In (1), we discuss node classification including low power nodes in emerging machine-type communications, and network capacity enablers, e.g., millimeter wave communications and massive multiple-input multiple-output. In (2), both logically distributed cell/device-centric platforms, and logically centralized conventional/wireless software defined networking control programming approaches are discussed. In (3), backhaul networks and network synchronization are discussed. A comparative analysis for each direction as well as future evolutionary directions and challenges toward 5G networks are discussed. This survey will be helpful for further research exploitations and network operators for a smooth evolution of their existing networks toward 5G networks.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • A Study of Liquid Sloshing in an Automotive Fuel Tank under Uniform

    • Authors: Rajamani Rajagounder, Guru Vignesh Mohanasundaram, Prakasan Kalakkath
      Abstract: This paper presents the liquid free surface behaviour in a partially filled automotive fuel tank under uniformly accelerated motion. The liquid in the fuel tank is subjected to violent sloshing during sudden acceleration or stopping of the vehicle which will produce structural vibration and noise in the passenger compartment. To reduce this sloshing, baffles are to be used inside the tank. The objective of this work is to study the influence of vertical baffles and fill levels on free surface elevation of liquid in a partially filled fuel tank. The simulation of liquid free surface behaviour under uniform acceleration is done using ANSYS-FLUENT software. A numerical model has been developed based on Volume of Fluid (VOF) technique to track the free surface motion of liquid. The explicit time discretization scheme is employed to solve the volume fraction equation. From the numerical analysis, amplitude of free surface elevation and slope of free surface are predicted. Experiments are carried out with transparent fuel tank which is fabricated using glass fibre and epoxy resin. A uniform acceleration is applied to the tank and free surface displacements of liquid are captured using high speed camera. Also, an analytical model is formulated to find position of the free surface of liquid under uniform acceleration. The free surface profiles obtained from the simulations are compared with the experimental results and analytical solution. These results are found to be in good agreement.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Hybrid-lens for Terahertz Subwavelength Focusing beyond the Diffraction

    • Authors: Piyawath Tapsanit, Masatsugu Yamashita, Chiko Otani
      Abstract: The relatively low energy of the terahertz light (THz, 1 THz=4.14 meV) promises the non-invasive optical imaging of the biomedical objects. However, the THz light inherently suffers the optical diffraction limit and the subwavelength microstructures cannot be resolved. We propose the planar hybrid-lens comprising the multiple slits and the two-dimensional rod array for the subwavelength focusing of the THz light beyond the diffraction limit. The hybrid-lens is investigated by the finite difference time domain simulation (FDTD). The spectra of the rod array obtained by FDTD are compared with the spectra calculated by the analytical model. The subwavelength focal spot about 20 µm (λ/7.5) at the frequency 2 THz is demonstrated by FDTD. The array of the subwavelength focal spots on the opposite side of the multiple slits are generated by the interferences of the Floquet-Bloch waves which can be guided through the rod array. The hybrid-lens can function as the subwavelength focusing and the substrate simultaneously which may serve as the new tool in the high-speed imaging and sensing of the subwavelength biomedical objects by using the THz light.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
  • Neural Network Based Model Predictive Control of Batch Extractive
           Distillation Process for Improving Purity of Acetone

    • Authors: Wachira Daosud, Kosit Jariyaboon, Paisan Kittisupakorn, Mohd Azlan Hussain
      Abstract: In a pharmaceutical industry, batch extractive distillation (BED), a combination process between extraction and distillation processes, has been widely implemented to separate waste solvent mixture of acetone-methanol because of minimum-boiling azeotrope properties. Normally, water is used as solvent and semi-continues mode is proposed to improve purity of acetone. The solvent is charged into the BED column until the purity of a desired product is achieved. After the total reflux start-up period is ended, a dynamic optimization strategy is applied to determine an acetone distillate composition profile maximizing the weight of the distillate product (acetone). The acetone distillate composition profile is used as the set point of neural network model-based controllers: the neural network direct inverse model control (NNDIC) and neural network based model predictive control (NNMPC) in order to provide the acetone composition with the purity of 94.0% by mole within 9.5 hours. It has been found that although both NNDIC and proportional integral derivative (PID) control can maintain the distillate purity on its specification for the set point tracking and in presence of plant uncertainties, the NNMPC provides much more satisfactory control performance and gives the smoothest controller action without any fluctuation when compared to the NNDIC and PID.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
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