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.

Numerical Bifurcation Analysis of Relative Equilibria with COMSOL

V. Thümmler
Universität Bielefeld, Fakultät für Mathematik, Bielefeld

Relative equilibria are special solutions of partial differential equations (PDEs), which are stationary in an appropriate co-moving frame of reference. If the equation has a special symmetry property - equivariance, then one can transform the equation into the co-moving frame during the computation of the solution. We will show that this can be very convenient for numerical computations. We ...

A Modular Platform for Cell Characterization, Handling, and Sorting by Dielectrophoresis

S. Burgarella[1], B. Dell’Anna[2], V. Perna[1], G. Zarola[2], and S. Merlo[2]

[1]STMicroelectronics, Agrate Brianza, MI, Italy
[2]Dipartimento di Elettronica, Università degli Studi di Pavia, Pavia, Italy

Dielectrophoresis (DEP) is a method for cell manipulation without physical contact in lab-on-chip devices, since it exploits the dielectric properties of cells suspended in a microfluidic sample, under the action of locally generated high-gradient electric fields. The DEP platform that has been developed offers an integrated solution for customizable applications. Several functional units, ...

A Study of Lubricating Flows in MEMS Bearings

E. Gutierrez-Miravete[1], and J. Streeter[2]

[1]Department of Engineering and Science, Rensselaer at Hartford, Hartford, Connecticut, USA
[2]Optiwind, Torrington, Connecticut, USA

The bearing and shaft are part of a safe and arm device constructed as an assembly by a multi-layer additive/subtractive plating and planarization processes (EFAB technology). Devices are constructed by a multi-layer additive/subtractive planarization process. This paper evaluates the lubricating flow between the shaft and journal of the MEMS bearing for seven configurations. The pressure ...

Wireless Interaction of Neighboring Two Arm Archimedes Spiral Coils in the RF Electromagnet Range

A. Kalinowski[1]
[1]Naval Undersea Warfare Center/ Division Newport, Newport, RI, USA

The paper addresses a class of problems for modeling and consequently simulating the electromagnetic field radiation pattern from two arms Archimedes spiral coils. The frequency spatial wavelengths relative to the coil dimensions are in a range where the electromagnetic Maxwell’s equations are solved numerically via the RF Module of COMSOL ...

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.

Optimal Electrical Design of Spherical Photovoltaic Cells

A.M. Morega, J.C. Ordonez, P.A. Negoias, M. Morega, and R. Hovsapian

This paper reports the optimization results of the new generation of honeycomb spherical photovoltaic cells (SPVC) with respect to the series electrical resistance. The electrical potential (voltage) distribution is found by numerically integrating the mathematical model of the DC current distribution within the SPVC. --------------------------------- Keynote speaker's ...

A Complete Transport Model of Components through Zeolite Membranes in a Wicke-Kallenbach Permeation Cell

C.J. Kamp, I. Perdana, and D. Creaser
Chalmers University of Technology, Gothenburg, Sweden,

This study discusses the development of a complete model for multi-component mass transport through a zeolite membrane in a Wicke-Kallenbach permeation cell. A three dimensional permeation cell model was built in COMSOL Multiphysics. The general PDE mode was used to apply the Maxwell-Stefan equations for surface diffusion, the dominant transport mechanism in zeolite micropores, while the ...

Modeling Electrochemical Systems with Multiphysics

R.E. White
University of South Carolina

In this presentation we introduce the concept of Electrochemical Engineering through simulations in COMSOL Multiphysics. Our special case studies are: • a Parallel Plate Electrochemical Reactor, • a Rotating Ring Disk System, • a 3D Lithium Ion Battery, • a Portable Power System, • a Corroding Surface. These examples are all industrial ones, which shows the power of using ...

Influence of COMSOL on the Design and Testing of the High Flux Isotope Reactor HB-4 Cold Source: Validation of the Simulation

J. D. Freels
Oak Ridge National Laboratory

This presentation concerns our numerical and experimental research on the High Flux Isotope Reactor HFIR, located at the Oak Ridge National Laboratory. In this presentation we give a Brief Pictorial Introduction to the HFIR, som physical properties of Supercritical Hydrogen, and Simulations of both natural and forced convection problems using COMSOL Multiphysics. This presentation also ...

Modeling of Next Generation Energy Systems by Using COMSOL: Fuel Cell, High Power Lithium Ion Battery, and Dye-Sensitized Solar Cell

Jake Kim
Samsung SDI CAE Team

In this presentation we present methods for modeling alternative energy sources such as Fuel Cells and Solar Cells. The presentation also considers aspects of the modern world and what impact the high consuming of energy sources will have on tomorrow's society. This presentation is written in Korean. --------------------------------- Keynote speaker's biography: Jake Kim received ...

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