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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.

Simulation of the Spread of Epidemic Disease Using Persistent Surveillance Data

Y. Liang[1], Z. Shi[1], S. Sritharan[1], and H. Wan[2]
[1]Central State University, Wilberforce, OH, USA
[2]Wright State University, Dayton, OH, USA

This paper proposes a novel data-mining framework to simulate the spread of epidemic diseases using persistent surveillance data. The framework is formulated by merging the persistent surveillance data about epidemics, geographic information and the dynamics of disease into a heat transfer model according to the theory of statistical mechanics . In the implementation of this framework, geographic ...

Modeling Energy Harvesting From Membrane Vibrations in COMSOL

R.K. Kapania, R.C. Singh, and C. Sultan
Virginia Polytechnic Institute and State University, Blacksburg, VA, USA

This paper presents an ongoing effort, motivated by developing self-contained sensors for structural health monitoring of inflatable structures, to model the process of extracting useable electrical power from the mechanical vibrations of thin, prestressed membrane structures. Energy harvesting from mechanical vibrations of these structures may provide enough power to operate both the sensors as ...

Computational Methods for Multiphysics Applications with Fluid-structure Interaction

P. Seshaiyer[1], K. Nong[1], S. Garcia[2], E. Aulisa[3], and E. Swim[4]
[1]George Mason University, Farifax, VA, USA
[2]United States Naval Academy, Annapolis, MD, USA
[3]Texas Tech University, Lubbock, TX, USA
[4]Sam Houston State University, Huntsville, TX, USA

Efficient modeling and computation of the nonlinear interaction of fluid with a solid undergoing nonlinear deformation has remained a challenging problem in computational science and engineering. Direct numerical simulation of the non-linear equations, governing even the most simplified fluid-structure interaction model depends on the convergence of iterative solvers which in turn relies heavily ...

Modification of the Ion Angular Distribution in Plasma Sheath: Modeling Approach under COMSOL Multiphysic

J. Brcka
TEL US Holdings, Albany, NY, USA

System for in-situ control of the ion angular distribution function (IADF) in plasma reactor is modeled. Typical IADF depends on the pressure, bias and excitation frequency. It is formed due to a difference in the physical properties of the plasma and sheath domains. The IADF is modified by biased grid which is built into a holder. The time varying E-field in sheath is influencing the ion path. ...

Simulation of Heating Sol-Gel Thin Film By Laser Pulse Train

J. Zhang[1], Y. Mizuyama[1], W. Xiong[2], Y. Zhou [2], and Y. Lu[2]
[1]Panasonic Boston Laboratory, Newton, MA, USA
[2]University of Nebraska, Lincoln, NE, USA

Simulation of laser pulse-train (25ns, 60 kHz and 3000 pulses) heating Sol-Gel thin film using COMSOL Multiphysics software is investigated. The results show two kinds of temperatures formed on film surface by laser pulse-train heating. One is a single pulse induced transient peak-temperature, which is up to ~1635oC on both Si and glass substrates. The other is the accumulated-temperature ...

Conducting Finite Element Convergence Studies Using COMSOL 4.0

M.K. Gobbert, and D.W. Trott
University of Maryland, Baltimore, MD, USA

We will show how to carry out convergence studies of the FEM error on a sequence of progressively finer meshes in COMSOL Multiphysics on the example of Lagrange elements of varying polynomial degrees, which will also bring out the benefit of using higher order elements. The sample studies will focus on Lagrange elements of degree 1 through 5. For these elements, the convergence order of the ...

Characterization of an AlGaN/GaN Electrostatically Actuated Cantilever Using the Finite Element Method

N. DeRoller, M. Qazi, J. Liu, and G. Koley
University of South Carolina, Columbia, SC, USA

AlGaN/GaN heterostructures are unique because the 2DEG at the interface is created by the difference in polarization properties of the AlGaN and the GaN layers; not due to intentional doping. In this work, a 3D model of an electrostatically actuated micro cantilever has been developed using COMSOL for characterization using the finite element method (FEM). The microcantilever has AlGaN/GaN HFET ...

Phonon Tunneling Loss Solver for Micro- and Nanomechanical Resonators

G.D. Cole[1], M. Aspelmeyer[1], and I. Wilson-Rae[2]
[1]University of Vienna, Vienna, Austria
[2]Technical University Munich, Munich, Germany

Micro-and nanoscale mechanical resonators have recently emerged as ubiquitous devices for use in advanced technological applications, for example in mobile communications and inertial sensors, and as novel tools for fundamental scientific endeavors. We report a significant advancement towards understanding and controlling support-induced losses through the demonstration of an efficient numerical ...

Two Dimensional Finite Element Heat Transfer Analysis of a Buried Refined Bitumen Pipeline During Initial Start-up, Shutdown Following Initial Start-Up, and Normal Operation

R. Sisco
Worcester Polytechnic Institute, Worcester, MA, USA

This body of work uses the two dimensional finite element heat transfer capabilities of the conduction application mode within COMSOL to examine the temperature distribution in the fluid, pipe wall, insulation, and surrounding soil of a prototypical bitumen pipeline operating in a cold weather environment during the following modes of operation: initial start-up, shutdown following initial ...

Analysis of Lubricant Flow Through Reynolds Equation

K.C. Koppenhoefer[1], S.Y. Yushanov[1], L.T. Gritter[1], J.S. Crompton[1], and R.O. Edwards[2]
[1]AltaSim Technologies LLC, Columbus, OH, USA
[2]Cummins Fuel Systems, Columbus, IN, USA

Reynolds equation is used to analyze fluid flow through small gaps. As such, the solution of Reynolds equation provides critical information for a wide range of tribological problems. In any case where a lubricant resides between two moving surfaces, the Reynolds equation can be used to solve for the flow. In the case considered in this paper, lubricant flows between a piston and housing forced ...