Technical Papers and Presentations

Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

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) ...

Modeling the Behavior of a Polymer Electrolyte Membrane within a Fuel Cell Using COMSOL

S. Beharry[1]
[1]University of the West Indies, St. Augustine, Trinidad and Tobago

One viable alternative to non-renewable fossil fuels is the fuel cell. A special class of FC i.e. Proton Exchange Membrane Fuel Cell (PEMFC) has been investigated during the present study. Membrane is a very important part of a PEMFC as most ohmic losses occurs here and limits the maximum operating temperature, causes fuel cross over effect and increase electrochemical kinetics losses resulting ...

Symmetric Stack Model of a Molten Carbonate Fuel Cell (MCFC) with Indirect Reforming

M. Pfafferodt[1], P. Heidebrecht[2], and K. Sundmacher[1,2]
[1]Otto-von-Guericke-University, Magdeburg, Germany
[2]Max-Planck-Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany

A model of a Molten Carbonate Fuel Cell (MCFC) stack with internal reforming is presented.  It describes the concentrations in the gas phase, the temperatures and the current densities in this highly integrated system. The differential equations, boundary conditions and the coupling equations used in the model are presented. A strategy to solve the system of partial differential ...

Fluid Flow and Current Density Distribution in Large-area HT PEMFCs

G. C. Bandlamudi[1,2], C. Siegel[2], C. Heßke[1], and A. Heinzel[1,2]
[1]ZBT Duisburg, Duisburg, Germany
[2]University of Duisburg-Essen, Duisburg, Germany

High temperature polymer electrolyte membrane fuel cells (HT PEMFCs) are very promising technologies when used in combined cooling and heating power (CCHP) systems. They are operated at 160°C, offering the possibility of high tolerance to fuel impurities and a possibility to use the heat generated for cooling and heating purposes, leading to higher total system efficiency. Employing a ...

Numerical Study of Microfluidic Fuel Cell Performance

A. E. Khabbazi[1], A.J. Richards[1], and M. Hoorfar[1]
[1]School of Engineering, UBC Okanagan, Kelowna, BC Canada, Canada

Using COMSOL Multiphysics 3.5, a numerical model has been developed to determine the effect of the channel geometry and electrode configuration on cell performance based on polarization curves. The Butler-Volmer equation was implemented to determine the reaction rates at the electrodes. The Conductive Media DC module is used to model the electric fields within the fuel cell.

Numerical Modeling of the Electrochemical Behaviour of Metallic Alloys based upon Experimental Measurements at the Macro- and Microscale

H. Krawiec1, V. Vignal2, and R. Akid3
1AGH University of Science and Technology, Krakow, Poland
2ICB, UMR 5209 CNRS, Université de Bourgogne, Dijon, France
3Sheffield Hallam University, Sheffield, UK

Micro capillary-based techniques allow the interrogation of single metallurgical sites and are therefore becoming increasingly popular for the investigation of the electrochemical behavior of metallic phases and non-metallic heterogeneities in alloys. This study was carried out to assess the differences between current measurements made using a 'closed' micro-capillary system (the electrochemical ...

Sequential Simulation in COMSOL using Differential Equations to Perform Digital Switching

L. Lam, and R. Darling
University of Washington
Seattle, WA

Many physical systems contain sequential modes of operation. The sequence is one-way and switching between modes is dependent upon specific internal parameters of the system itself. While COMSOL provides the flexibility to perform time-domain simulation and time-based modifications of boundary conditions, simulating sequential systems based upon internal physical variables in COMSOL can be a ...

Diffusion-controlled Redox Cycling at Nanoscale Interdigitated Electrodes

Yang, X.1, Zhang, G.1, 2, 3
1 Micro/Nano Bioengineering Laboratory, Department of Biological and Agricultural Engineering
2 Nanoscale Science and Engineering Center
3 Faculty of Engineering, The University of Georgia, Athens, GA 30602, USA

Diffusion controlled redox cycling behavior at nanoscale interdigitated electrodes (IDEs) was simulated using FEMLAB. Cyclic voltammograms were obtained for IDEs with various sizes and spacing, and current collection efficiency and cycling number were calculated. We found that as the size of the IDEs decreased, the shape of the voltammogram changed from a peak-shaped curve to a sigmoidal ...

COMSOL Multiphysics and the Fuel Cell

J.J. Hwang
National University of Tainan

This presentation considers multiphysics modeling of Fuel Cells. The presentation introduces the fundamentals of Fuel Cells, the need for computer aided modeling of them, different difficulties and hindrances one encounters when modeling Fuel Cells, and methods to overcome these difficulties when modeling them. A good understanding and thorough discussion on different types of Fuel Cells ...

Optimization of the Lithium Insertion Cell with Silicon Negative Electrode for Automotive Applications

R. Chandrasekaran, and A. Drews
Research and Advanced Engineering
Ford Motor Company
Dearborn, MI

The US Advanced Battery Consortium (USABC) has established goals for long term commercialization of advanced batteries for electric vehicle applications. In this work, a dual lithium-ion insertion cell with silicon as the negative electrode and an intercalation material as the positive electrode is modeled using COMSOL Multiphysics. Both are composite porous electrodes with binder, void volume ...

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