SORIN Group, France
In all implantable medical devices, one main challenge is to assure no water penetrates in the electronic part of the system. To be able to transmit the electronic information from the inside of the device to the lead without any water infiltration, we used a complex part called feed through. This piece is made of four different materials: titanium, alumina, gold and platinum. It is ...
M. Ek, and D. Sichen
Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden
In the steelmaking processes, the stirring of the metal bath by argon (or nitrogen) injection is a widely used method to achieve chemical or thermal homogeneity. Computational fluid dynamics can be used as a very powerful tool to gain an insight into the mass transfer and heat transfer in liquid steel. In this paper, the flow behaviors in two different steelmaking reactors were simulated using ...
S. Floody, R. Venegas, and F. Leighton
Universidad de Chile, Facultad de Artes, Departamento de Música y Sonología, Licenciatura en Sonido, Santiago, Chile
University of Salford, Acoustics Research Centre, Salford, UK
Universidad Tecnológica de Chile Inacap, Sede Pérez Rosales, Santiago, Chile
The present article presents a method to redistribute the acoustic modes of a rectangular enclosure in the low frequency range using slit resonators. The objective of the present work is to compare different strategies of optimal design in order to determine the dimensions of the resonators. The method of the finite elements will be used to model the acoustic physical behavior of the room. In ...
S. Anyyeva, and K. Kunisch
Institute of Mathematics and Scientific Computing
Karl Franzens University
We treat a gradient constrained minimization problem which has applications in mechanics and superconductivity. A particular case of this problem is the elastoplastic torsion problem. In order to solve the problem we developed an algorithm in an infinite dimensional space framework using the concept of the generalized Newton derivative. The Desktop environment of COMSOL Multiphysics 4.1 was ...
N. Lemcoff, R. Pastor, and E. Miravete
Rensselaer Polytechnic Institute, Hartford, CT
General Dynamics Electric Boat, Groton, CT
The objective of this study is to numerically evaluate the effectiveness of an energy recovery ventilator (ERV) during the summer and winter seasons. The energy recovery ventilator allows heat and mass transfer between two air streams separated by a membrane. The effects of varying the following parameters were examined: flows through the supply and exhaust ducts, height of the exhaust channel, ...
S. V. Kulkarni
Indian Institute of Technology
S. V. Kulkarni a Professor in Electrical Engineering Department, Indian Institute of Technology, Bombay, India. Previously, he worked at Crompton Greaves Limited and specialized in the design and development of transformers up to 400 kV class. He has authored book \"Transformer Engineering: Design and Practice\" published by Marcel Dekker, Taylor & Francis Group. The author of more than 120 ...
Renewable Energy RD Center, Chung-Hsin Electric & Machinery, Taiwan
Proton exchange membrane fuel cells (PEMFCs) were investigated using COMSOL Multiphysics with the AC/DC Module and Chemical Engineering Module. Simulation may be used to increase the performance while decreasing the cost of the catalyst later (CL). Experimental validation of single and multi-layer CL was performed for varied PBI electrolyte content. The validated model was used to investigate ...
J. Yoo, H. Soh, J. Choi, S. Song
Department of Mechanical Engineering, Yonsei University, Korea
Hyundai Motor Co., Korea
Samsung Electronics Co., Ltd., Korea
Mando Co., Korea
Nanoscale structural analysis and design is presented. All the simulations are carried out using a finite element solver and optimization is performed using parameter and topology optimization schemes. It is concluded that COMSOL is effective for analysis and design of nanoscale structure design in electromagnetic field and it may be combined with several optimization methods to improve system ...
Andrew B. Randles
Julius M. Tsai
Institute of Microelectronics, Agency of Science, Technology, and Research, Singapore, Singapore
We have modeled surface acoustic wave (SAW) devices composed of piezoelectric materials: aluminum nitride (AlN), lithium niobate (LiNbO3), and quartz. These materials are often used in RF filters and wireless sensors, which require temperature compensation for stability. Using our COMSOL Multiphysics® simulation with published values of thermal expansion for each material, we simulated the TCF ...
COMSOL Multiphysics® Simulations of Cracking in Point Loaded Masonry with Randomly Distributed Material Properties
A.T. Vermeltfoort, A.W.M. van Schijndel
Eindhoven University of Technology, Eindhoven, The Netherlands
This paper describes COMSOL Multiphysics® simulations of the stress and crack development in the area where a masonry wall supports a floor. In these simulations one of the main material properties of calcium silicate, its E-value, was assigned randomly to the finite elements of the modeled specimen. Calcium silicate is a frequently used building material with a relatively brittle fracture ...