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.

Modeling of Lead-acid Flow Battery

M. N. Nandanwar[1], S. K. Gupta[1]
[1]Indian Institute of Science, Bangalore, India

Failure of conventional lead-acid battery is attributed to degradation of solid active mass (PbO2 and PbSO4 ). A number of research efforts are underway worldwide to overcome degradation of active mass to improve the cycle life of lead-acid batteries. Soluble lead-acid flow battery (SLFB) is a new kind of lead-acid flow battery in which products of discharge remain in dissolved state. SLFB ...

Current Density Simulations in the Electrodeposition from Ionic Liquids: Effects of the Conductivity

I. Perissi[1], C. Borri[1], S. Caporali[1], and A. Lavacchi[1]
[1]Department of Chemistry, University of Firenze, Sesto Fiorentino, FI, Italy

The overall goal of this work is the use of COMSOL Multiphysics® in the modeling of the current density distributions for the electrodeposition of aluminum coatings from ionic liquids. The local current distribution is strongly dependant on the conductivity and on the geometry of the galvanic cell and can only be computed by the numerical solution of the partial differential equations ...

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 ...

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 24 ...

Dependence of the Current Density Distribution with Flow Channel Geometry in a Half-Cell Model - new

O. Beruski[1], J. Perez[1]
[1]Institute of Chemistry of São Carlos, São Carlos, SP, Brazil

The present work demonstrates that a simple half-cell model is capable of reproducing qualitatively the main features of the measurements of the current density distribution in a high-temperature polymer electrolyte fuel cell, pointing that computational modeling and simulation are an important tool in the development of such devices. Our main interests with such a model is to optimize working ...

Modeling Migration-Diffusion-Reaction Processes in an Idealized Lithium-Sulfur Cell

G. Minton [1], R. Purkayastha [1], S. Walus [1], M. Marinescu [2], T. Zhang [2], G. Offer [2],
[1] Oxis Energy Ltd, Oxford, United Kingdom
[2] Imperial College London, London, United Kingdom

During the basic operation of a lithium-sulfur (Li-S) cell, sulfur molecules are required to undergo a complex mix of electrochemical and chemical reaction processes. To date, almost all modeling of Li-S cell behavior has been undertaken using electroneutral, structurally homogenized, cell scale models accounting for most of these processes. The presented work was undertaken in order to try and ...

Screening Effects in Probing the Electric Double Layer by Scanning Electrochemical Potential Microscopy

R.F. Hamou[1], P.U. Biedermann[1], A. Erbe[1], and M. Rohwerder[1]
[1]Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany

A computational method is developed to study probing the electric double layer by Scanning Electrochemical Potential Microscopy. The model is based on a modified Poisson- Boltzmann equation, which takes into account steric effects. We investigated the effect of metallic apex protrusion and the Open Circuit Potential (OCP) of the tip on the probed potential. A clear electrostatic screening effect ...

Tertiary Current Distributions on the Wafer in a Plating Cell

L. Tong[1]
[1]Keisoku Engineering System Co., Tokyo, Japan

The tertiary current distributions on the wafer in a plating cell are studied in this work. An acid copper sulfate electrolyte composed of CuSO4/5H2O of 2.4 g/L and H2SO4 of 90 g/L is taken into account for copper deposition on the wafer. The solution of shear-plate agitating fluid dynamics is coupled into the calculation of tertiary current distributions. The obtained distributions of tertiary ...

Thermal Diffusivity Test Bench for Li Ion Cells Using LiveLink™ for MATLAB®

A. Arzberger[1]
[1]RWTH Aachen University -ISEA-, Aachen, NRW, Germany

LiveLink™ for MATLAB® is used to fit the surface temperature of a battery cell within a COMSOL Multiphysics® model to the temperature measured by a thermal imaging camera. The test bench was designed and built up of ourselves to allow nondestructive thermal diffusivity measurement of Li Ion cells as a function of temperature, state of charge (SOC), state of health (SOH) and others. In that way ...

Computational Modelling of Fluid Dynamics in Electropolishing of Radiofrequency Accelerating Cavities - new

H. Rana[1], L. Ferreira[2]
[1]Loughborough University, Leicestershire, UK
[2]European Organisation for Nuclear Research (CERN), Genéve, Switzerland

Electropolishing is an electrochemical process that radiofrequency accelerating cavities undergo in order to improve their inner metal surface finishing. This is performed prior to their installation into particle accelerators, in order to enhance their accelerating properties. Using COMSOL Multiphysics® software it was possible to model the process throughout the cavity and study the fluid ...