Simulation of a New PZT Energy Harvester with a Lower Resonance Frequency Using COMSOL Multiphysics® - new
H. Elbahr, T. Ali[1,2], A. Badawi, S. Sedky
Zewail City of Science and Technology - Cairo, Cairo, Egypt
Cairo University, Cairo, Egypt
Energy harvesting from environmental vibration nowadays is feasible because of natural oscillations like that caused by air or liquid flow and by exhalation or the heartbeat of a human body. This vibration frequency is typically low (in order of less than 1 kHz). Accordingly, low-frequency vibration based energy harvesting systems are an important research topic; these systems can be used for ...
F. S. Alleyne , R. R. Milczarek ,
 Healthy Processed Foods Research Unit, U.S. Department of Agriculture, Albany, CA, USA
Solar drying is a ubiquitous method that has been adopted for many years as a food preservation method. Most of the published articles in the literature provide insight on the performance of solar dryers in service but little information on the dryer construction material selection process or material attributes that allow them to be selected as candidates in solar dryer designs. 1–7 ...
Novel Approach for Teaching Microchemical Systems Analysis to Chemical Engineering Students Using Interactive Graphical User Interfaces (GUIs)
A. Nagaraj , P. L. Mills ,
 Department of Chemical and Natural Gas Engineering, Texas A&M University - Kingsville, Kingsville, TX, USA
Chemicals are an integrated part of our daily life. While chemicals are significant contributor to a nation’s economy, sound management of chemical production is essential for environmentally friendly operation without maximizing operational costs. Next generation technologies must be developed that potentially change the chemical plants and process engineering giving rise to safe, compact, ...
Geometric Modeling and Numerical Simulation of Airfoil Shapes Using Integrated MATLAB® and COMSOL Multiphysics
A. Safari, H. Lemu G., H. Severson
University of Stavanger, Stavanger, Norway
This paper proposes a framework for an efficient integration between geometric modeling program and analysis tool for a coming automated aerodynamic design optimization mission. This demand can be addressed by using both in-house codes and commercial software which have the good ability of live-link and efficient integration. In this study, the mathematical modeling of a turbomachinery airfoil ...
Comparison of Classic and Finned Piston Reciprocating Linear Air Compressor Using COMSOL Multiphyics® - new
M. Heidari, P. Barrade, A. Rufer
LEI, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
The current work is dedicated to develop a FEM model for compressors using moving mesh. An analytical model is already developed for a classic compressor based on mass and energy balance and is extended to a finned piston compressor. COMSOL Multiphysics® is employed to verify the analytical results and to provide an insight to detailed modeling of the system in desired areas. Moving mesh is ...
E. Holzbecher, H. Räuschel
Georg-August Universität Göttingen, Göttingen, Germany
Borehole heat exchangers (BHE) in connection with heat pumps and floor heating in many countries are becoming an alternative to conventional heating or cooling systems using fossil resources. We describe how 1D components for heat transport in pipes can be coupled with a 2D or 3D component for the ground. Thermal conductances are derived for laminar, transitory and turbulent flow conditions in ...
P. Bergmann , F. Grün ,
 Chair of Mechanical Engineering, Montanuniversität Leoben, Leoben, Austria
Wear in hydrodynamic journal bearings resulting from solid contact in the mixed friction regime becomes an increasingly prominent topic leading to the necessity of numerical wear evaluations. A numerical method tackling this topic based on Archard’s wear law is presented and applied on a close-to-component journal bearing test rig. This approach allows a validation of numerical results by ...
R. Latchman , A. Pooransingh ,
 University of the West Indies - St. Augustine, St. Augustine, Trinidad and Tobago
Conventional swing is one phenomenon which a bowler uses to gain an advantage over the batsman. This study involved simulating conventional swing in the CFD Module of COMSOL Multiphysics® software and comparing the simulated results with experimental results of previous researchers. The variation in the side and drag forces on the ball were investigated by varying the velocity, seam angle and ...
L. Desgrosseilliers, and D. Groulx
A cornerstone of Chemical and Mechanical Engineering undergraduate programs the world over is the experimental and theoretical study of heat exchange. Graduating engineering students gain some appreciation in their lab course by comparing empirical correlations combined with the thermodynamics of heat exchange with the real operation of a counter-current, double pipe, single-phase heat exchanger.
Weak Form & LiveLink™ for MATLAB® Based Modified Uzawa Method For Solving Steady Navier-Stokes Equation - new
H. Sheng, S. Zhu
Shanghai Jiaotong University, Minhang, Shanghai, China
We demonstrate a simple example about how to design my own algorithm for Navier-Stokes equation by weak form PDE and LiveLink™ for MATLAB®. After the computation, we get the same solution as other FEM packages (FreeFEM++ & FeniCs) at each iterative step, and we can see the Navier-Stokes equation’s solution at error between each step. This attempt gives algorithm researchers a hint or a ...