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.

COMSOL API Based Toolbox for the Mixed-Level Modeling of Squeeze-Film Damping in MEMS: Simulation and Experimental Validation

M. Niessner[1], G. Schrag[1], J. Iannacci[2], and G. Wachutka[1]
[1]Institute for Physics of Electrotechnology, Munich University of Technology, Munich, Germany
[2]MEMS Research Unit, Fondazione Bruno Kessler, Povo di Trento, Italy

We present an easy-to-use toolbox for the automated generation of reduced-order mixed-level models for the evaluation of squeeze-film damping in microelectromechanical systems. The toolbox is programmed in JAVA and heavily exploits the functionality provided by the COMSOL API. The results obtained from mixed-level model simulation performed in COMSOL Multiphysics agree very well with ...

Design and Development of Microsystems within a Corporate Research Environment by Utilizing Comsol Multiphysics

A. Frey
Siemens AG
Corporate Research & Technologies
Munich, Germany

Alexander Frey received his M.A. degree from the University of Texas, Austin, in 1994, the Dipl. Phys. degree from the University of Wuerzburg, Germany in 1997 and the PhD from the Saarland University, Germany in 2010. In 1997 he joined Research Laboratories of Siemens working on the design of DRAM sensing circuits. In 1999 he joined Corporate Research, Infineon, Munich, Germany. He was engaged ...

Optical Manipulation of Microscopic Objects

R. Ozawa
Yokohama University

In recent years, optical manipulation using optical radiation pressure has been widely studied. In this study, the radiation pressure exerted on various kinds of microscopic objects with different laser beams was evaluated by COMSOL Multiphysics software. By changing beam shapes, microscopic objects can be trapped and rotated. This paper is in Japanese.

Numerical Modeling of a MEMS Sensor with Planar Coil for Magnetic Flux Density Measurements

J. Golebiowski[1], S. Milcarz[1]
[1] Department of Semiconductor and Optoelectronics Devices, Technical University of Lodz, Lodz, Poland

The silicon cantilever with the planar coil was applied to the magnetic flux density measurements. The influence of shape and dimensions of planar coil on magnetic energy density was described. In cause of magnetic anisotropy of analyzed silicon structure FEM method and couple field method was applied in simulation. The Lorentz force based sensors owing to their potentially simpler fabrication ...

Effect of Fluid Conditions on Air-Liquid Interface in Hydrophobic Micro Textured Surface

S. Takahashi[1], S. Ogata[1]
[1]Tokyo Metropolitan University Hachioji City, Tokyo, Japan

We studied the influence of a number of gas-liquid interface on the drag reduction effect by numeric simulation. Level set method was used for an analysis of gas-liquid interface. The analytic model is rectangular channel of height h = 5 micrometer and width w = 20 micrometer with two hydrophobic microstructures in bottom of channel. In this channel, we found that the liquid penetrates in the ...

Experimental and Theoretical Studies on Air Exchange in Portable Devices

M. Olin [1], L. Laakso [1], J. Hannula [2], T. Galkin [2], K. Väkeväinen [2], and K. Hartikainen [3]
[1] University of Helsinki, Finland
[2] Nokia Corporation, Finland
[3] Ambertec Oy, Finland

In this paper, we perform a leakage analysis fitted to approximate analytical diffusion and air exchange models, by the helium injection method for one mobile phone type. In order to extend the applicability of our models, we developed a more complicated numerical model for diffusion, thermal conduction and free convection inside the phone.

Shape, Convection and Convergence

R. Pryor
Pryor Knowledge Systems, Inc., Bloomfield Hills, MI, USA

COMSOL Multiphysics software, when properly configured, can readily solve modeling problems in the laminar flow regime using the standard Navier-Stokes equations or in the fully turbulent flow regime using the kappa-epsilon model. Failure to solve a particular model is typically manifested by instability in the calculation and a failure of the model to converge. This paper presents a new approach ...

Efficient Generation of Surface Plasmon Polaritons with Asymmetric Nano-structures

J. Chen
Peking University

This paper covers the following: * All-Optical Light Modulation of surface plasmon polaritons (SPPs) is achieved using asymmetric single nanoslits. A high on/off switching ratio of >20 dB and phase variation of >? were observed with the device lateral dimension of only about 2 ?m. * Efficient unidirectional excitation of SPP as well as beam splitting are achieved using the ...

Simulation of Deformed Solid Particles in Constrained Microfluidic Channel

M. Cartas-Ayala[1], R. Karnik[1]
[1]Massachusetts Institute of Technology, Cambridge, MA, USA

Characterization of particles has numerous applications in science and diagnostics. Recently, particle passage through constrained microchannels has been proposed to characterize particles based on their passage velocity. Nevertheless, there is no clear understanding of how the physics in this system interact. Here we quantify the effects of the flow around the particle by simulating the passage ...

Optimization of the Temperature Distribution in a Chemical Microreactor using a Multi-Segment Integrated Thin Film Heater

T.R. Henriksen, S. Jensen, U. Quaade, and O. Hansen
Technical University of Denmark

COMSOL Multiphysics has been used to study the effect of different heater design parameters on the temperature distribution in a chemical microreactor. The primary objective of the simulations has been to optimize the temperature uniformity inside the reaction chamber. In the simulations, special attention has been given to how the number, positions and widths of the heater strips relate ...

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