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.

Low Pt Cathodes for High Performance PEMFCs: Modeling and Experiments

F. Daouda[1], J. Hamelin[1], P. Benard[1], S. Kumar Natarajan [1]
[1]Insitut de recherche sur l'hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada

We present a novel multi-layered electrode fabrication technique for polymer electrolyte membrane fuel cells (PEMFCs). This method consists of alternate layers of Pt deposition (0.05 mg/cm²) by sputtering on the painted multi-walled carbon-Nafion layer (CNL) with larger concentration of catalyst particles closer to the membrane. Parametric models were developed and validated by experimental ...

Modellierung von Dünnschichtzellen Thin Layer Flow Cell Modelling

E. Holzbecher[1], J. Fuhrmann[1], R. Halseid[2], and R.J. Behm[2]
[1] WIAS, Numerische Analysis, Berlin
[2] Universität Ulm, Ulm

Two designs for thin layer flow cells were set up at University of Ulm, Germany, in order to identify parameters describing the kinetics of methanol-oxydation – reactions, to be utilized in fuel cells. Computer models for two designs were constructed using COMSOL Multiphysics. Results from the numerical simulations were used to evaluate the different flow cell designs. The aim to ...

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 ...

Clean Energy Technologies: Growing Need for Multiphysics Modeling

Iouri Balachov
Senior Scientist,
SRI International, Menlo Park, CA, USA

Iouri Balachov is a Senior Scientist at SRI International (Menlo Park, CA) where he is leading development of Direct Carbon Fuel Cell technology for clean and efficient power generation from coal, biomass, and a wide variety of carbon containing fuels. Prior to SRI he was an engineer at Westinghouse nuclear (Pittsburgh, PA), researcher at Penn State University (State College, PA), and researcher ...

Modeling of the Transport Phenomena in Lithium-Ion Battery Electrolytes

A. Nyman, M. Behm, and G. Lindbergh
Applied Electrochemistry, School of Chemical Science and Engineering, Royal Institute of Technology Stockholm, Sweden

Modeling of mass transport is an important step in evaluating lithium-ion battery electrolytes and understanding cell performance. For high-power applications, concentration gradients in the electrolyte lead to limiting currents, which limit the power-density of the battery. The model has been used for determining a complete set of transport and thermodynamic properties for LiPF6 dissolved in an ...

Finite Element Analysis of an Enzymatic Biofuel Cell: The Orientations of a chip inside a blood artery

C. Wang[1], Y. Parikh[1], Y. Song[1], and J. Yang[1]
[1]Mechanical & Materials Science Engineering, Florida International University, Miami, Florida, USA

Output performance of an implantable enzymatic biofuel cell (EBFC) with three- dimensional highly dense micro-electrode arrays has been simulated with a finite element analysis approach. The purpose of this research is to optimize the orientation of this EBFC chip inside a blood artery such that the mass transport of glucose around all the micro-electrodes can be improved and hence output ...

Convective Movements in an Electrolyser

B. Morel1, P. Namy2, C. Belhomme1, and I. Crassous3
1Comurhex, Pierrelatte, France
2SIMTEC, Grenoble, France
3LI2C, Paris, France

Modeling electrolysers is a challenge because of the strong coupling between electrical, thermal and CFD equations. Indeed the electrical conductivity of the electrolyte varies with the temperature, which in turn depends on the heat dissipated by the Joule effect and anode over-voltage.In the present study, the fluid velocity values are computed near the electrodes using a diphasic level set ...

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 ...

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 ...

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