Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Modelling of the Hydrogen Diffusion in Martensitic Steel in Contact with H2SO4 Media

J. Bouhattate[1], X. Feaugas[1], and S. Frappart[1][2]
[1]Laboratoire d’Etudes des Matériaux en Milieux Agressifs,
Université de La Rochelle, La Rochelle, France
[2]V&M France, CEV, Aulnoye-Aymeries, France

Hydrogen Embrittlement (HE) is one of the mechanisms responsible for premature failure of structures. In the context of environmental sustainability, it is compelling to improve or conceive new processes and/or new materials capable of reducing fracture induced by HE. We analyzed the influence of the oxide layer on the permeability of hydrogen. This investigation was carried on as a correlative ...

Simulation of the Shape of Micro Geometries Generated with Jet Electrochemical Machining

M. Hackert[1], G. Meichsner[2], and A. Schubert[1,2]
[1]Micromanufacturing Technology, Chemnitz University of Technology, Chemnitz, Germany
[2]Fraunhofer Institute of Machine Tools and Forming Technology, Chemnitz, Germany

Electrochemical Machining with a closed electrolytic free jet is a special procedure to generate complex micro structures by help of anodic dissolution. The work piece shape is fabricated by supplying an electrolytic current through an electrolyte jet ejected from a small nozzle. In this study COMSOL Multiphysics is used to simulate the electric current density in the jet and the dissolution ...

Lithium-Ion Battery Simulation for Greener Ford Vehicles

D. Bernardi
Ford Motor Company

Dr. Bernardi is a Research Engineer with Ford Motor Company in Dearborn, MI. Her research focuses on the analysis and simulation of electrochemical energy-storage and conversion systems. In particular, Dr. Bernardi develops mathematical models that predict system behavior and identify governing physicochemical processes. Experimental investigations support model development, analysis, and ...

Using Computational Multiphysics to Optimise Channel Design for a Novel PEM Fuel Cell Stack

F. A. Daniels[1], D. J. L. Brett[1], A. R. Kucernak[2], and C. Attingre[2]
[1]University College London, London, UK
[2]Imperial College London, London, UK

Polymer electrolyte membrane (PEM) fuel cells have significant potential as a source of clean, efficient energy production. This study presents a three-dimensional, non-isothermal, fully-coupled model of a PEM fuel cell with printed circuit board current collectors. The effect of the current collector design on transport phenomena and consequent cell performance is investigated. The model ...

Optimizing Fuel Cell Design with COMSOL Multiphysics

Chin-Hsien Cheng[1]
[1]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 ...

3D Model for the Dynamic Simulation of SOFC Cathodes

A. Häffelin, J. Joos, M. Ender, A. Weber, and E. Ivers-Tiffée
Institut für Werkstoffe der Elektrotechnik (IWE)
Karlsruher Institut für Technologie (KIT)
Karlsruhe, Germany

A fuel cell is an electrochemical system, which converts chemical energy into electricity by a controlled reaction of hydrogen and oxygen. The performance of the electrode is likewise determined by its material and the microstructure. The simulations were performed directly on reconstructions of real electrodes, obtained from focused ion beam (FIB) tomography. A finite element method (FEM) ...

Modelling of a 5 Cell Intermediate Temperature Polymer Electrolyte Fuel Cell (IT-PEFC) Stack: Analysis of Flow Configuration and Heat Transfer

A.S. Chandan[1], A. Mossadegh Pour[2], R. Steinberger-Wilckens[2]
[1]Centre for Hydrogen and Fuel Cell Research, University of Birmingham, Birmingham, United Kingdom
[2]University of Birmingham, Birmingham, United Kingdom

Polymer Electrolyte Fuel Cells (PEFCs) are a key technology in the advancement of society towards a low carbon future, in particular for use within the automotive sector. PEFCs are advantageous due to their low operating temperature (60-80 deg.C), quick start up times and responsiveness to load change. However, the requirement for expensive platinum, difficulty of water management and heat ...

Optimizing Electrode Surface Area by COMSOL Multiphysics®

B K SRIHARI[1], Dr K Nagarajan[1], Dr B Prabhakar Reddy[1], P VENKATESH[1]
[1]Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

In the design of electrorefiner, Working electrode and Counter electrode surface areas are very important. The main aim of this study is to understand the effect of the ratio of Anode to cathode Surface areas in an electrorefining cell. Application of this model to design electrorefiner for metallic spent nuclear fuel is discussed with respect to Uranium recovery. Shaping of real anode surface ...

Computational Modelling of Fluid Dynamics in Electropolishing of Radiofrequency Accelerating Cavities - new

H. Rana[1], L. Ferreira[2]
[1]Loughborough University, Leicestershire, UK
[2]European Organisation for Nuclear Research (CERN), Genéve, Switzerland

Electropolishing is an electrochemical process that radiofrequency accelerating cavities undergo in order to improve their inner metal surface finishing. This is performed prior to their installation into particle accelerators, in order to enhance their accelerating properties. Using COMSOL Multiphysics® software it was possible to model the process throughout the cavity and study the fluid ...

Simulation of a Heated Tool System for Jet Electrochemical Machining

M. Hackert[1], G. Meichsner[2], and A. Schubert[1][2]

[1]Chair Micromanufacturing Technology, Faculty of Mechanical Engineering, Chemnitz University of Technology, Chemnitz, Germany
[2]Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany

Jet Electrochemical Machining (Jet-ECM) is an unconventional procedure using localized anodic dissolution for micromachining. An increasing of the electrolyte temperature will lead to an increase of the electrical conductivity of the electrolyte by about 30% and to a reduction of the dynamic viscosity of the electrolyte by about 25 %. Both will improve the process. Therefore a Jet-ECM tool ...