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.

Grain Boundary Migration Model in Copper Interconnects

Tim Cale, Daniel Bentz, and Max Bloomfield, RPI

We discuss the use of 3D grain continuum modeling to study grain boundary migration driven by differences in strain energy density. COMSOL Multiphysics is used to compute stresses and strain energy densities in polycrystalline structures caused by temperature changes. We treat each grain as a single crystal, with the anisotropic elastic properties of single crystal Cu appropriately rotated to ...

Single Mode Microwave Heating of Copper Powder Metal Compacts

J. Ma, C.T. Smith, G.J. Weisel, B.L. Weiss, N.M. Miskovsky, and D.T. Zimmerman.
The Pennsylvania State University.

We present numerical simulations that complement our experimental results of the microwave heating of copper powder metal compacts in separate electric (E) and magnetic (H) fields of a TE102 cavity. In general, thermal dissipation in the compacts may be attributed to resistive heating, dielectric losses, and magnetic losses. These dissipative mechanisms are coupled to the fields by the effective ...

Applying Grain Continuum Models to Stress Induced Grain Evolution in Next Generation Integrated Circuit Interconnects

D.N. Bentz, M. Bloomfield, J-Q. Lu, R.J. Gutmann, and T.S. Cale
Focus Center—New York, Rensselaer: Interconnects for Hyperintegration

We discuss the use of 3D grain continuum modeling to study grain boundary migration driven by differences in strain energy density. COMSOL Multiphysics is used to compute stresses and strain energy densities in polycrystalline structures caused by temperature changes. The grain boundary speeds are computed using a simple model that relates them to grain boundary mobility and differences ...

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.

Use of COMSOL to Estimate the Thermal Properties and Kinetic Parameters for the Degradation of Anthocyanins in Grape Pomace

D.K. Mishra[1], and K.D. Dolan[1,2]
[1] Department of Biosystems and Agricultural Engineering, Michigan State University
[2] Department of Food Science and Human Nutrition, Michigan State University

Degradation of components in low-moisture and high-temperature food is difficult to model because of the temperature gradient and long heating time. A method was developed to estimate the thermal properties of grape pomace and the rate constant and activation energy of anthocyanin degredation.

Chemical Pulse Dynamics and Control in Microdesigned Catalysts: Phenomena, Modeling and Computational Wrappers

L. Qiao, and I.G. Kevrekidis
Department of Chemical Engineering, Princeton University

We study the effect of two-dimensional composite catalyst geometry and spatiotemporal laser heating on the dynamics of CO oxidation on a Pt (110) surface. The project involves a combination of modeling, computation and experimentation. We show (through both FEMLAB and specially designed experiments) that local laser heating actuation appropriately designed in space and time can be critical in ...

Effects of Nonlinear Magnetic Properties on Magnetic Bonding Forces for Magnet Array Self-Assembly

S.B. Shetye, J.S. Agashe, and D.P. Arnold
University of Florida

The objective of this researh is to develop new, magnetically-directed, self-assembly approaches to enable three-dimensional structures to be formed in parallel from a heterogeneous mixture of parts of arbitrary size and shape.

Transport Phenomena in Nafion®-Polypropylene Composite Membranes

V.V. Narvekar, Q. Fan, and S. Warner
Dept. of Materials and Textiles, University of Massachusetts, Dartmouth

A computational model is used to describe the current density distribution and the water management in the Nafion® 117 and Nafion®1115/PP composite membranes. The effects of the change in the membrane water content and the back-diffused water on distribution of proton concentration is discussed.

Numerical Investigation for Hydrogen Production using a Proton Exchange Water Electrolysis Cell

S.P. Katukota, J. Chen, and R.F. Boehm
University of Nevada, Las Vegas

Proton Exchange Membrane (PEM) electrolysis is potentially a sustainable and cost-effective technology for generating hydrogen. The present work is aimed to develop a numerical model for the PEM electrolyzer cell.

Mathematical Modeling of Blood Flow in the Presence of Atherosclerosis

T. Gadkari, and A. Jeremic
McMaster University, ON, Canada

Atherosclerosis affects the arterial blood vessels causing stenosis in the arteries because of which the artery hardens resulting in loss of elasticity in the affected region. In this paper, we present an approach to model the pulsating flow of blood through such an atherosclerosis affected region of the artery using the finite element method. We further discuss the statistical model used to ...

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