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.

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 ...

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.

Comparison of Two-Dimensional PEM Fuel Cell Modeling using COMSOL Multiphysics

Z. Shi, X. Wang, and Z. Zhang
Oakland University, Rochester, MI

Two different two-dimensional mathematical models of the one PEM fuel cell are modeled using COMSOL Multiphysics, each considering a different cross-section. The first Models considers the influence of fluid behavior in the channel, while the second considers the interdigitated flow pattern. Results, including the mass concentration, the polarization curve, potential distribution and velocity ...

Use of COMSOL Multiphysics for Optimization of an All-Liquid PEM Fuel Cell

G.H. Miley[1], and E.D. Byrd[2]
[1] Department of NPRE, University of Illinois at Urbana-Champaign
[2] Department of ECE, University of Illinois at Urbana-Champaign

A model has been designed and constructed for the all-liquid, sodium borohydride/hydrogen peroxide fuel cell. The electrochemical behavior, momentum balance, and mass balance effects within the fuel cell are modeled using the Butler-Volmer equations, Darcy’s law, and Fick’s law, respectively within COMSOL Mutiphysics. The simulations performed with the model indicate that an optimal ...

Meso-Scale Multiphysics Model of SOFC Cathode Processes

W. Huang, X. Huang, and K. Reifsnider
Connecticut Global Fuel Cell Center, University of Connecticut

Meso-scale structures significantly influence fuel cell performance and durability. We have modelled the multiphysics processes in the solid oxide fuel cell cathode-electrolyte interfaces considering the detailed distribution and geometry of the ionic conducting phase, the electronic conducting phase, and the pores. The model is solved using COMSOL Multiphysics and results provide ...

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 ...

Development of a Coupled 2D-3D Fuel Cell Model for Flow Field Analysis

G.H. Miley[1], G. Hawkins[2], and J. Englander[2]
[1] Department of Nuclear, Radiological, and Plasma Engineering, University of Illinois at Urbana-Champaign
[2] Department of Aerospace Engineering, University of Illinois at Urbana-Champaign

The sodium borohydride and hydrogen peroxide liquid fuel cell developed at the University of Illinois shows promise as a viable energy source for a wide range of applications. To achieve higher powers for a fixed active area, an optimal flow field design is desired, and a coupled 2D-3D model of the fuel cell was developed using the COMSOL Multiphysics software package. The model is governed by ...

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.

Simulation of the Capacitive Double Layer at the Interface between Microelectrodes and Cortical Tissue Using Comsol Multiphysics and SPICE Modeling

R.M. Field, and M. Ghovanloo
NC-Bionics Laboratory, North Carolina State University

The interface between microelectrodes and biological tissue is of great interest to researchers working on extracellular stimulation. In this paper, we outline a method used to model the complex double layer capacitance at the interface between the electrodes and the cortex. This model relies on the combined power of SPICE, MATLAB, and COMSOL Multiphysics. The goal of this model is to ...

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