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.

Reactor Design Improvements for a Propane Autothermal Reformer by Simulation of Momentum Flow

F. Cipitì, L. Pino, A. Vita, M. Laganà, and V. Recupero
CNR-ITAE, Messina

The paper presents a two-dimensional model to describe the gas flow in a propane autothermal reactor, developed at the CNR-ITAE Institute, and aimed to design a Beta 5 kWe hydrogen generator, named HYGen II, to be used with Polymer Electrolyte Fuel Cells (PEFCs) for residential applications. The main aim of the mathematical model was to optimize the reactor geometrical key parameters (diameter ...

Large Scale 3D Flow Distribution Analysis in HTPEM Fuel Cells

C. Siegel[1][2], G. Bandlamudi[1][2], N. van der Schoot[1], and A. Heinzel[1][2]
[1]Zentrum für BrennstoffzellenTechnik GmbH, Duisburg, Germany
[2]Institut für Energie- und Umweltverfahrenstechnik, University of Duisburg-Essen, Duisburg, Germany

Accurate bipolar-plate and flow-field layout is one crucial task for optimizing fuel cells. These cell components perform several functions, including charge transport or gas and water transport throughout the cell just to name a few. Overall, the design depends on the fuel cell application or the geometrical size of the assembly. The requirements for a flow-field used in a high temperature ...

Simulation of Evaporating Droplets on AFM-Cantilevers II: Confocal Microscopy and Transversal Bending

T. Haschke[1], E. Bonaccurso[2], H.J. Butt[2], F. Schönfeld[3], and W. Wiechert[1]
[1] Universität Siegen, Lehrstuhl für Simulationstechnik, Siegen
[2] Max-Planck-Institut für Polymerforschung, Mainz
[3] Institut für Mikrotechnik Mainz GmbH, Mainz

The evaporation process of microscopic drops was investigated by depositing them onto atomic force microscope (AFM) cantilevers and measuring the deflection of the cantilever in response to the presence of the drop. We could thus improve a previously presented FE simulation model by comparing the simulations of the cantilever’s transversal deflection to 3-D images of the cantilever’s ...

Modeling Two-Phase Electrophoresis

W. Clark[1], and M. Lindblad[1]
[1]Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, Massachusetts, USA

Two-phase electrophoresis is a separation method that combines aqueous two-phase partitioning with electrophoresis and has promise for large scale recovery of biological products. Aqueous two-phase systems formed by adding two polymers, like dextran and polyethylene glycol, to water provide some separation of dissolved species due to differences in solubility of solutes between the phases. COMSOL ...

COMSOL Implementation of Valet-Fert Model for CPP GMR devices

T. Xu[1], C.K.A. Mewes[1], S. Gupta[2], and W.H. Butler[1]
[1]Department of Physics and Astronomy and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA
[2]Department of Metallurgical and Materials Engineering and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA

The Giant Magneto Resistance (GMR) effect is a quantum mechanical effect which can be observed in systems consisting of thin alternating ferromagnetic and non-ferromagnetic layers. Simulation using COMSOL allows the evaluation of the magneto-resistance ratio and the electrical resistances of realistic CPP-GMR devices and opens the possibility to study new device materials and designs.

Deep Desulfurization of Diesel Using a Single-Phase Micro-Reactor

G. Jovonavic[1], J. Jones[1], and A. Yokochi[1]
[1]School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA

This paper describes the benefits of computational fluid dynamics in the development of a microreactor used in the desulfurization of aromatic compounds. It is crucial to verify diffusion and extinction coefficients to ensure accurate simulation results prior to experiments. COMSOL Multiphysics was used to model the behavior of all of the possible species present and reactions that may occur.

Error Analysis in Estimating Temperature-Dependent Thermal Diffusivity and Kinetic Parameters using Heat Penetration Data

K.D. Dolan[1,2], A.R. Sommerlot[1], and D.K. Mishra[1]
[1]Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, Michigan, USA
[2]Department of Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA

Growing consumer demand for nutraceuticals has stimulated interest by food companies to increase levels of these health-promoting compounds. Thermal processing of canned foods in a retort produces a unique problem: some of the nutraceuticals are highly sensitive to temperature, and require accurate parameter estimates to predict their fate during processing. Error in temperature measurement due ...

Using a Linux Cluster for Parallel Simulations of an Active Magnetic Regenerator Refrigerator

T.F. Petersen, N. Pryds, and A. Smith
Risø National Laboratory, Fuel Cells and Solid State Chemistry Department, Roskilde

The Magnetic Refrigerator (MR) is a special type of refrigerator with potential to reduce the energy consumption of household refrigeration by a factor of two or more. To conduct numerical analysis of an experimental MR, a mathematical model was developed. The model solves the coupled Navier-Stokes and heat transfer equations which describe the physical phenomenon occurring within the MR. To ...

Deformable Medical Image Registration using the Finite Element Method

J. Li, and T.C. Zhu
Department of Radiation Oncology, University of Pennsylvania

Deformable medical image registration is studied with two models developed using COMSOL Multiphysics. One is based on the plane strain application mode and the other on the moving mesh (ALE) application mode. The models are examined by registering gross target volumes of a head-neck tumor with two sets of CT images. The comparison shows that the registration using the moving mesh (ALE) ...

Chargenwärmebehandlung von Stahl

J. Siebert[1], W. Muschik[2], H. Apel[3], and W. Koch[4]
[1] Technologieprojekte, Magdeburg
[2] Technische Universität, Institut für Theoretische Physik, Berlin
[3] FH Magdeburg-Stendal, Technische Betriebswirtschaft, Magdeburg
[4] Rothenseer Werkstoffprüfung und -bearbeitung GmbH, Geschäftsführung, Magdeburg

Schwerpunkte dieses Vortrages bilden die Verknüpfungen folgender Themenkomplexe: • Werkstoffwissenschaft • Energieverfahrenstechnik • Qualitätsmanagement • Polyoptimierung Für derart umfassende Aufgabenstellungen gibt es zur Zeit keine Softwarelösungen. So ist z.B. die Kundenforderung nach Garantie erhöhter Schlagarbeit bei stark abgesenkten negativen Temperaturen in keinem ...

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