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.

Effect of Electron Transfer Rate on the Electrochemical Process of Interdigitated Electrodes

X. Yang[1], and G. Zhang[1-3]
[1] Micro/Nano Bioengineering Laboratory, Department of Biological and Agricultural Engineering, The University of Georgia
[2] Nanoscale Science and Engineering Center, The University of Georgia
[3] Faculty of Engineering, The University of Georgia

Affinity-based sensing often relies on the blockage for electron transfer at an electrode surface due to complimentary binding. Such blockage will reduce the electron transfer rate (ETR) in an electrochemical detection method such as electrochemical impedance spectroscopy (EIS) or cyclic voltammogram (CV). To improve the sensitivity of the CV method, we studied the CV performance of ...

Gas Permeation Laboratory Experiment Simulation for Improved Learning

J. Lebowitz, and W.M. Clark
Worcester Polytechnic Institute

We are testing the hypothesis that the simulation of laboratory equipment will solidify the link between experiment and theory and provide improved learning for senior chemical engineering undergraduates. We developed a simulation of an industrially important gas permeation experiment in which air is separated into an oxygen-rich stream and an oxygen-depleted stream using a hollow fiber ...

Quasi-static Analysis of Shielded Microstrip Lines

S.M. Musa, and M.N.O. Sadiku
Prairie View A&M University, Texas

Microstrip lines are the most commonly used transmission lines at high frequencies. In this paper, we will illustrate how to model the capacitance of microstrip lines using COMSOL Multiphysics. The goal is to determine the capacitance per unit length of shielded microstrip lines.

Synthesis of Force-Free Magnetic Fields as an Unconventional Inverse Problem

P.R. Kotiuga
Boston University

Here, the notion of a force-free magnetic field is conceptually useful in formulating inverse problems that articulate design objectives. In this paper, previous work pertaining to the topological structure of 3D force-free magnetic fields is reviewed, an inverse problem is formulated, and the role of the "dominant" eigenfield of the curl operator is considered. The problem of synthesizing ...

Computer Modelling of Deformable non-Newtonian Flow using COMSOL Multiphysics

H.A. Lecuyer[1], F.H. Bertrand[1], P.A. Tanguy[1], J.P. Mmbaga[2], and R.E. Hayes[2]
[1] Ecole Polytechnique , Montreal
[2] University of Alberta, Edmonton

This presentation is concerned with the modelling of deformable non-Newtonian Flow using COMSOL Multiphysics. This general modelling approach has more concrete applications such as paper coating in a metering size press, meniscus location by PIDS to mention a few.

3D Temperature Distribution during Self-Propogating High-Temperature Synthesis of Advanced Ceramics

I. Selig[1], S. Lin[1], D.L. Cocke[1], and D. Luss[2]
[1] Lamar University
[2] University of Houston

Self-propagating High-temperature Synthesis (SHS) is an economical process to produce quality advanced ceramics. In this work, SHS of solid oxide fuel (SOFC) cathode materials was modeled using COMSOL Multiphysics.

Constructal Design of Concurrent Power Distribution Networks

A.M. Morega[1], and J.C. Ordonez[2]
[1] Department of Electrical Engineering, POLITEHNICA University of Bucharest, Romania
[2] Department of Mechanical Engineering and Center for Advanced Power Systems, Florida State University

This paper reports a strategy to design a network of higher immunity and capacity of recovery to faults or other destructive events. The capacity of survivorship and recovery increases when the system possesses some redundancy, and this means sources and lines and switching capability that are able to take over areas that loose connectivity to their parent source. Therefore, a second network, ...

Modelling of Layered Rocks with COMSOL Multiphysics

M.A. Rojas[1], and V. Grechka[2]
[1] University of Houston
[2] Shell International E&P

We present static and dynamic computations of the apparent properties for stacks of horizontal isotropic layers (VTI symmetry). The effective stiffness tensors of such media are given by the Backus theory for statics in the limit of zero thicknesses of the constituent layers. We used COMSOL Multiphysics to verify the theoretical static bounds for these effective stiffnesses.

Using Spacers in MD Channels

A.M. Alklaibi
Technical college, Jeddah, Saudi Arabia

A membrane distillation process equipped with mesh-type material spacers has been modeled as a two-dimensional conjugate problem in which a simultaneous numerical solution of the momentum and energy of the feed and cold solutions have been carried out. The results shows that the center suspended spacer produces the highest average shear stress, and gives the highest spacer efficiency at all ...

Applied Multiphysics in Thermoresistive and Magnetoresistive Sensor Models

R.W. Pryor
Pryor Knowledge Systems, Inc.
COMSOL, Certified Partner

Efficient, effective, and functional operation of autonomous systems requires a comprehensive real-time understanding, by those systems, of the embedding environment. This paper presents a brief overview of the multiphysics considerations involved in the development of models for thermoresistive and magnetoresistive sensors systems.

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