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.

FEM Simulation of the Scanning Electrochemical Potential Microscopy (SECPM)

R. Hamou, P. Biedermann, M. Rohwerder, and A. Blumeneau
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany

The present work focuses on modeling a new experimental technique: Scanning Electro-chemical Potential Microscopy (SECPM), which is used to probe the potential profile of the electric double layer (EDL). We used an electrostatic approach to compute the EDL potential measured within the metallic probe. Also, we investigated the effect of the interaction of the electrode/probe double layers on the ...

Study of Hydrogen Release from a Metal Hydride Bed

K. Song[1], and H. Knickle[1]

[1]Department of Chemical Engineering, University of Rhode Island, Kingston Rhode Island, USA

In this paper we present a study of the time dependent analysis of a metal hydride bed (MHB) which provides constant flow to a fuel cell at required power loading and pressure. The hydrogen gas phase pressure, the hydrogen concentration in the metal hydride and the hydrogen desorption rate are consider as key variables in this study. Both the space scale and time scale analysis are performed. ...

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 the ...

Optimisation of the Electrochemical Instrumentation of a Wear Simulator through Finite Element Modelling

Déforge, D.1, 2, Ponthiaux, P.2, Wenger, F.2, Lina, A.1, Ambard, A.1
1 Electricité de France (EDF) R&D, Chemistry and corrosion group, Les Renardières, Moret sur Loing cedex, France
2 Laboratory LGPM, Ecole Centrale Paris, Chatenay-Malabry cedex, France

Stainless steels are often used in nuclear power plants due to their good corrosion resistance. This good behaviour is due to an oxide film which forms on their surface and insulates them from the corrosive media. Sometimes, flow-induced vibrations can however lead to some contacts between the components, and thus to the degradation of this oxide film. The mechanical removal leads to an increase ...

Microband Electrodes in Microchannels: Edge Diffusion and Wall Effects

N. Godino1, F. J. del Campo2, and F. X. Muñoz1
1Instituto de Microelectrónica de Barcelona, IMB-CNM-CSIC, Barcelona, Spain
2Institut de Biotecnologia i Biomedicina "Vicent Pallar Palasi", Universitat Autónoma de Barcelona, Barcelona, Spain.

Microfluidics enables the miniaturization and integration of sensors into advanced analytical devices. Electrochemical detection is currently one of the preferential techniques of use in microfluidic devices due to its sensitivity, low cost and compatibility with new microfabrication techniques. In this work, we first model the electrochemical response of a set of microband electrodes placed ...

Multiphysics Simulation of an Anode-supported Micro-tubular Solid Oxide Fuel Cell (SOFC)

G. Ganzer, W. Beckert, T. Pfeifer, and A. Michaelis
Fraunhofer IKTS
Dresden, Germany

The high thermal stability and fast start-up behavior make micro-tubular solid oxide fuel cells (SOFCs) a promising alternative for small-scale, mobile power devices in the range of some Watts. To understand the transport phenomena inside a single micro-tubular SOFC, a 2-D, axi-symmetric, non-isothermal model, performed in COMSOL Multiphysics® 4.2, has been developed. Due to long current path ...

Mathematical Modeling of Direct Borohydride Fuel Cells and its Experimental Validation

A. K. R. Paul[1], K. S. Gandhi[2], and A. K. Shukla[3]
[1] Central Electrochemical Research Institute – Madras Unit, CSIR Complex, Taramani, Chennai, Tamil Nadu, India
[2] Department of Chemical Engineering, Indian Institute of Science, Bangalore , Karnataka, India
[3] Solid State & Structural Chemistry Unit, Indian Institute of Science, Bangalore , Karnataka, India

  Direct borohydride fuel cells (DBFCs) use sodium borohydride (NaBH4) as fuel and hydrogen peroxide (H2O2) as an oxidant. A mathematical model encompassing mass balance of ionic species in different regions of the DBFC is developed. Both the oxidation of sodium borohydride and reduction of hydrogen peroxide are assumed to obey Tafel kinetics. This is combined with boundary conditions ...

Flow Accelerated Corrosion Modelling of Carbon Steel using FEMLAB : A Preliminary Study

Amimer, A.1, 2, Mandin, P.3, Lincot, D.3, Horner, O.1
1 EDF R&D, Département MMC, Moret-sur-Loing, France
2 Ecole Nationale Supérieure de Chimie de Paris, Paris, France
3 Ecole Nationale Supérieure de Chimie de Paris, UMR 7575, Paris, France

Flow Accelerated Corrosion (FAC) of carbon steel has been studied world-wide for more than twenty years and is now fairly well understood. The influence of several parameters like water chemistry (pH, dioxygen content), temperature, hydrodynamic or mass transfer conditions (flow velocity, geometry) and steel composition on the corrosion kinetics has been demonstrated both theoretically (“Berge ...

Numerical Modelling of Electrophoresis Applied to Restoration of Archaeological Organic Materials

J. Caire[1], A. Bouh[1], and E. Guilminot[2]
[1]LEPMI, UMR 5631, INPG - CNRS, Saint Martin d’Hères, France
[2]EPCC, Arc'Antique, Nantes, France

Restoration of archaeological materials from oceans is a major activity of Arc’ Antique. Organic materials such as wood, tissues, leathers, papers and ceramics found in sea water are always impregnated with salts. Rinsing such archaeological objects with pure water to extract the salts takes too long, so electrophoresis was used to improve the salt extraction. The objective of this ...

Improving Fuel Usage in Microchannel Based Fuel Cells

P. Fodor, and J. D'Alessandro
Dept. of Physics
Cleveland State University
Cleveland, OH

In this work a miniaturized fuel cell design based on microchannels, into which the liquid fuel and oxidizer streams are fed through T shaped connectors, is optimized for improved fuel usage. This particular design exploits the laminar nature of the fluid flow at small Reynolds numbers to keep the fuel and oxidizer confined in the vicinity of the corresponding electrodes without the need of a ...

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