T. Machado Amorim , C. Allély, J. Caire
Arcelor Mittal Research, Maizieres-les-Metz, France
ENSEEG, Grenoble, France
The corrosion at cut-made edges is significant due to the anode to cathode surface ratio in this region. The major problems are the risks of red rust appearance at the exposed steel surface, and the risks of paint delamination in case of insufficient corrosion protection. The work presented here focuses on the development of a 2D FEM model simulating a steady state corrosion situation at a cut ...
C. Siegel1,2, G. Bandlamudi1,2, and A. Heinzel1,2
1Zentrum für BrennstoffzellenTechnik (ZBT) GmbH, Duisburg, Germany
2Institut für Energie- und Umweltverfahrenstechnik, University of Duisburg-Essen, Duisburg, Germany
Phosphoric acid doped polybenzimidazole (PBI) membranes are commonly used for high temperature polymer-electrolyte-membrane (HTPEM) fuel cells in order to achieve high proton conductivity. Only a few numerical HTPEM fuel cell studies along with experimental validation are currently available. Here, a HTPEM fuel cell model is developed and simulated using COMSOL Multiphysics. Emphasis is put on ...
Modeling of the Material/Electrolyte Interface and the Electrical Current Generated During the Pulse Electrochemical Machining of Grey Cast Iron
O. Weber, A. Rebschläger, P. Steuer, D. Bähre
Center for Mechatronics and Automatization, Saarbrücken, Germany
Institute of Production Engineering, Saarland University, Saarbrücken, Germany
The Pulse Electrochemical Machining is especially suitable for the precise production of complex geometric contours with high precision and high surface quality demands in series manufacturing. During this process, the negative structure of an electrode is copied to the workpiece without sub-surface damages. An adequate knowledge of the current and thus of the material removal behavior is ...
R. Painter, S. Berryhill, L. Sharpe, S. K. Hargrove
Department of Civil Engineering, Tennessee State University, Nashville, TN, USA
Department of Mechanical Engineering, Tennessee State University, Nashville, TN, USA
COMSOL® "Single Particle Model for Lithium-Ion Batteries” (Model ID: 14527) is generalized to include an energy balance. This is accomplished by approximating the solution phase polarization as a function of current and temperature. The theoretical approach for this work is similar to Guo et al. [Journal of the Electrochemical Society, 158, (2) A122-A132 (2011)] for modeling lithium ion ...
University of Trinidad and Tobago, Couva, Trinidad and Tobago
This paper presents a 2D model of an intermediate temperature ammonia-fed SOFC (400 – 700 °C) based on the Temkin-Pyzhev model of ammonia decomposition. Phenomenological equations are implemented in COMSOL Multiphysics®. The Dusty Gas Model is used to model species transport in porous media, but a modification of Fick’s Law is used. Results show that intermediate temperatures can alleviate ...
M.S. Nesro, I.M. Elfadel
Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, UAE
Lithium microbatteries are replacing conventional power sources in many microsystems areas such as wireless sensors and biomedical monitors. In many of these applications, compact models of micro batteries are needed both at the microsystems design stage and at the real-time power management stage. These compact models are typically derived from physics-based discretized formulations. We have ...
COMSOL Multiphysics® Based Identification of Thermal Properties of Mesoporous Silicon by Pulsed Photothermal Method - new
N. Semmar, I. El Abdouni, A. Melhem
GREMI-UMR7344, CNRS/University of Orléans, Orléans, France
The silicon is mainly known under its single-crystal shape and polycrystalline. Since a few decades, a new type of morphology is developed: the porous silicon (p-Si). Meso-porous silicon (Mp-Si) is one of promising materials for future microelectronic chips multi-functionalization systems, and for micro-sensing devices. For thermal properties investigation many experimental systems were ...
M. Stroe1, R. Oltra1, B. Vuillemin1, and G. Girardin2
1Institut Carnot de Bourgogne (ICB), Dijon, France
2AREVA NP, France
Crevice corrosion of stainless steel in chloride media was investigated based on an 11 species model. The role of parameters such as pH inside the crevice, external potential, chloride concentration of the bulk solution and crevice geometry was studied. A thermodynamic criterion for arrest / propagation of the crevice corrosion was used in order to identify the conditions for which the localized ...
Analysis of the Electrochemical Removal of Aluminum Matrix Composites Using Multiphysics Simulation - new
M. Hackert-Oschätzchen, N.Lehnert, M. Kowalick, G. Meichsner, A. Schubert[1,2]
Professorship Micromanufacturing Technology, Technische Universität Chemnitz, Chemnitz, Germany
Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany
In the Collaborative Research Centre 692 at TU Chemnitz several academic institutions work on aluminum matrix composites (AMCs). These materials consist of an aluminum matrix, which is reinforced by SiC or Al2O3 particles with dimensions less or equal 1 µm. One main task is finishing machining of AMCs by electrochemical machining (ECM). The goals are depending on the application whether to ...
A. Samba, N. Omar, H. Gualous, Y. Firouz, O. Capron, M. Abdel MonemO, J. Smekens, P. Van den Bossche, J. Van Mierlo
VUB ETEC, Brussel, Belgium and UCBN, LUSAC, Cherbourg, France
VUB ETEC, Brussel, Belgium
UCBN, LUSAC, Cherbourg, France
Multi-Scale and Multi-Dimensional (MSMD) modeling approaches have been proposed to simulate the thermal, electrical distributions and concentration behaviors of large size pouch cell. This approach is based on coupling of the energy balance with the Newman’s electrode model. Newman’s 1D electrochemical model is often used for small size batteries but not sufficient enough for large size where ...