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.

Heat Pipe Assisted Thermal Management of an HT PEMFC Stack

E. Firat[1], G. Bandlamudi[1], M. Crisogianni[1], P. Beckhaus[1], A. Heinzel[1]
[1]Centre for Fuel Cell Technology (ZBT), Duisburg,NRW, Germany

Heat management is crucial for the satisfactory operation of HT-PEM (High temperature polymer-electrolyte-membrane) fuel cells. Current work investigates the use of heat pipes in a HT PEMFC stack consisting of 24 cells, each with an active area of 300 cm^2. Heat pipes are known to be thermal superconductors operating on the principles of high convective heat transfer and phase transition. ...

Modeling of Supercapacitor

G. Madabattula[1], S. K. Gupta[1]
[1]Department of Chemical Engineering, Indian Institute of Science, Bangalore, Karnataka, India

Low cost high energy density batteries that can be charged and discharged rapidly are required in a number of applications. Tapping energy from renewal resources such as solar, wind and tide requires rapidly generated energy to be first stored and then used round the clock. Storing energy of a moving vehicle as it slows down and recovering it to accelerate the vehicle later can significantly ...

The Fast Model for Ionic Wind Simulation

A. Samusenko[1], Yu. Stishkov[1], P. Zhidkova[1]
[1]Saint Petersburg State University, Research and Educational Center “Electrophysics”, St Petersburg, Russia

Ionic wind is the gas flow induced by the corona discharge. Ions produced by corona are accelerated by electric field and transfer their momentum to neutral molecules. Using ionic wind one can convert electric energy to kinetic energy of air flow almost directly. The phenomenon of ionic wind finds applications in electrostatic precipitators and ionizers. It is difficult to solve the complete ...

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 system ...

Two-Dimensional, Non-Isothermal, Two-Phase Flow inside the Gas Diffusion Layer Unit of the Polymer-Electrolyte-Membrane Fuel Cell

C. Siegel
Universität Luxemburg, Facultät STC/Elektrotechnik, Luxemburg

A two-dimensional, non-isothermal, two-phase flow model of a porous cathode gas diffusion layer of a polymerelectrolyte- membrane fuel cell is presented and solved numerically using computational fluid dynamics coding and sequentially solver scripting. The model accounts for multicomponent species diffusion, phase change and water transport. The heat transfer is investigated for the fluids ...

Modeling Electrodeposition of Charged Nanoparticles Onto Fuel Cell Coolant Flow Channel Walls

J. Cheng, K.V. Sharp, and M.M. Mench
The Fuel Cell Dynamics and Diagnostics Laboratory and the Microscale Flow Laboratory, Department of Mechanical and Nuclear Engineering, Pennsylvania State University

The dynamics of fuel cell coolant flow with charged nanoparticles were modeled using COMSOL Multiphysics. A computational fluid dynamics physicochemical model of the multi-phase coolant flow has been formulated. For nanoparticles in the fluid, electrokinetic force, hydrodynamic force, and buoyancy forces have been taken into account for the prediction of electrodeposition rate onto channel ...

Propagation of Crevice Corrosion by Numerical Modelling

A. Proust[1], G. Girardin[1], B. Vuillemin[2], P. Combrade[1], and R. Oltra[2]
[1] AREVA NP - Centre Technique - Département Corrosion-Chimie, Le Creusot
[2] Université de Bourgogne - Laboratoire de Recherche sur la Réactivité des Solides

The most common case of crevice corrosion occurs on passive materials such as stainless steels, in oxidizing-chloride environments. A flexible crevice propagation model has been developed to allow parametric studies of the solution. Our main results allow us to establish diagrams of stability of solid and gas phases within the crevice and to evaluate the influence of the external ...

Propagation of Localised Corrosion: FEM Approach

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 ...

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 ...

Simulation of C-MEMS Based Enzymatic Biofuel Cell

Y. Parikh, V. Penmatsa, J. Yang, and C. Wang

Department of Mechanical & Material Science Engineering, Florida International University, Miami, FL, USA

An Enzymatic Biofuel Cell (EBFC) converts the chemical energy in biological fuels into electricity. In this work, we optimize the performance of the Carbon-Micro Electro Mechanical system in an EBFC by using COMSOL Multiphysics. With a simple model, we realized that most of the glucose reacts with enzymes at the top of the electrode posts, while the bottoms of the posts remain deficient of the ...

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