Finite Element Approach for Optimizing the Cooling of the Metallic Bipolar plates for Fuel Cell Applications
E. Firat[1,2], C. Siegel[1,2], L. Kühnemann[1,2], P. Beckhaus, and A. Heinzel[1,2]
Zentrum für Brennstoffzellentechnik (ZBT) GmbH, Duisburg, Germany
University of Duisburg Essen, Duisburg, Germany
Metallic bipolar plates promise several advantages for fuel cell applications. On the other hand, cooling of these plates is a critical task regarding design optimization. The high thermal conductivity of the material and the complex geometry of these plates affect directly the cooling performance. To analyze this phenomenon, a 3D model is set-up and solved using a FEM (finite element method) ...
Comparative Study of an Open Waveguide.Application to Deconvolution of a Magnetic Probe in Near-Field Zone
A. Saghir, J.W. Tao, and C. Avram
INP, Laplace site Enseeiht, Toulouse, France
We present here our work on deconvolution of a magnetic probe to mesure electromagnetic emissions in near-field zone. To achieve this work,we have chosen a rectangular waveguide (WR90) as a radiating structure.Theoritical near-field is simulated using a FEM software (COMSOL) and also obtained by using a program based on transverse operator method (TOM), that lead to a very good field ...
O. Nemitz, and T. Schmitte
Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany
In the inspection of steel products with respect to flaws a magnetic flux leakage (MFL) test procedure can be applied. In this procedure a “horseshoe” shaped yoke is used, whose legs are wrapped with coils through which an alternate current with a high frequency (3 kHz) is flowing. Hereby a thin magnetic field is induced near the surface of the test object which leaks from the material if a ...
Machine Design, KTH, Stockholm, Sweden
Electrical contacts consists of parts where the surfaces are in contact and where the actual physical contact occur just in a few contact asperity points scattered over the whole apparent contact area. Through these contact spots between the two mating bodies the mechanical load and the electric current is transmitted. Often a soft coating is used to enlarge the real contact area. Modeling the ...
E. Madieta, V. Piron, A. Flament, J.P. L’Huillier, and E. Mehinagic
PRES L’UNAM, ESA, Grappe, Angers, France
ENSAM Paristech, Angers, France
Since the invention of laser sources, understanding the interaction between the laser and biological tissues is a subject of great importance because of their medical applications in particular for diagnostic purposes. They recently found a growing interest in the sector of the arboriculture to check the fruits quality in a non-destructive way. In this work, we study the interaction between the ...
BD Medical - Medical Surgical Systems, Helsingborg, Sweden
Anders B Nilsson graduated M. Sc. in engineering physics from Lund University in Sweden. He has been working in the R&D department at BD Medical as principal engineer and project leader since 2005. He uses COMSOL for a wide range of functions, such as early concept development and qualification of products.
W. R. Kampinga, and Y. H. Wijnant
Reden, Hengelo, Netherlands
University of Twente, Enschede, Netherlands
Three efficient alternatives to the model in COMSOL’s thermoacoustics interface are presented. The higher efficiency of these models are explained from theory and are demonstrated by means of two examples.
T. Slawig, and U. Prüfert
Christian-Albrechts-Universität Kiel, Kiel, Germany
TU Bergakademie Freiberg, Freiberg, Germany
Use of COMSOL Multiphysics equation-based model capability to solve optimization and control problems. Solution of time-dependent problems with space-time finite elements. Solution of constraint optimization problems. Mathematical back-up for equation-based optimization.
T. Graf, O. Schälli, and Z. Stössel
Hochschule Luzern Technik & Architektur
Sensors for industrial applications require electro-magnetic compatibility protection elements. It is an advantage to incorporate the protection elements directly in the application specific integrated circuit (ASIC). These protection elements however experience significant heating. It was not possible to apply the conventional IC design process. We established new design rules.To do so we used ...
F. Loos, and H.-D. Ließ
Universität der Bundeswehr München
The purpose of this work is to investigate the triggering behaviour of safety fuses for mobile on board supply systems. The influence of different materials and shapes of the fuses on the triggering behaviour are analyzed. Furthermore, the simulation results obtained by the use of COMSOL Multiphysics® are compared to experimentally achieved data. For the transient simulation of the heat ...