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.

Study of how electromagnetic characteristics of human abdomen affects B1+ distribution on 3T MR Imaging

A. Nabetani
GE Healthcare Japan Corporation, Japan

It was studied how the permittivity and the conductivity of humans had influence on the transmit B1 magnetic field distribution in the abdominal region. It was also studied how these electromagnetic characteristics affected the static RF shimming which is defined as RF shimming by applying amplitude scaled and phase shifted version of essentially the same RF signal to multiple transmit elements.

Driving Method of Microtool by Horizontally-arranged Permanent Magnets for Single Cell Manipulation

F. Arai
Nagoya University, Nagoya, Japan

This paper presents two innovative driving methodologies using magnetically driven microtools for precise cell manipulations and its automation systems. The new driving methodologies are introduced and backed up with FEM analysis using COMSOL and the experimental results. The positioning accuracy improves 3-10 times and the following response become 10 times higher.

Excitation, Propagation, and Focusing of Surface Plasmon Polaritons around A Pair of Subwavelength Holes on Silver Thin Film

Y. Oshikane
Osaka University, Osaka, Japan

Simulation results regarding excitation, propagation, and focusing of SPP waves around a pair of subwavelength holes on silver thin film by COMSOL Multiphysics + RF Module are presented. This research has been performed for development of a novel tiny spot of extremely intensified optical near-field at the apex of optical fiber probe for scanning near-field optical microscope.

Flexible MEMS Actuated Display System and Modeling Optimization

G. Tortissier[1], C.-Y. Lo[2], H. Fujita[1], and H. Toshiyoshi[1,3]
[1]LIMMS/CNRS-IIS(UMI-2820), Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
[2]Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Taiwan
[3]Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan

Previous works on MEMS actuated Fabry-Perot interferometer (FPI) highlighted promising results for flexible display applications. Three primary color pixels have indeed been obtained using both photolithography and Roll-to-Roll printing process with satisfying color purity and transmittance. However both of these processes are expensive and time-consuming for preparing micropatterns. For these ...

MEMS RF Switch For CPW Circuits

G. Umesh[1], P. Bhat[2], and M.S. Bhat[2]
[1]Physics Dept., NITK Surathkal, Mangalore, Karnataka, India
[2]Dept. of E&C, NITK Surathkal, Mangalore, Karnataka, India

We have simulated a capacitive MEMS switch for application to Coplanar Waveguide (CPW) circuits using COMSOL Multiphysics. The switch configuration involves a pair of metal bridges over the CPW line designed for operation in the Ka - Band frequencies. It is shown that the operating frequency of the switch can be tuned by adjusting the gap between the two bridges. Estimation of the switch ...

Modeling of Freeze-Drying of Coffee Solution using Arbitrary-Lagrangian-Eulerian (ALE) Method

C. Anandharamakrishnan, R. Deepak, N. Chhanwal, and K.S.M.S. Raghavarao
CFTRI, Mysore, Karnataka, India

Freeze-Drying is used widely in the food and pharmaceutical industries for its ability to dry thermolabile product and retain high quality. Freeze-drying involves three stage processes such as (i) freezing, (ii) primary drying and secondary drying. Modeling of primary drying is a very complex process because of the presence of a moving sublimation front whose position is determined by the heat ...

Propagation of Higher Order Modes in Optical Fibers

J.T. Andrews, R.R. Kumar, and P.K. Sen
Department of Applied Physics, S G S Institute Technology & Science, Indore, Maharashtra, India

Understanding higher order mode generation in optical fibers has the following advantages: (i) Supercontinuum generation is possible (ii) Various fiber optic sensors may have increased sensitivity and (iii) dispersion management as well as optimization is possible with appropriate control of higher order modes. We took simple cases where single mode and multimode fibers (SMF/MMF) are used. ...

Design and Simulation of SAW Device using MEMS Technology

P.R. Basha, B. Mishra, and A. Zachariah
School of Electronics Engineering, VIT University, Vellore, Tamil Nadu, India

The realization of miniature SAW device is compatible on CMOS device for mobile and wireless communication system has become very important in recent years. Acoustic wave propagation along the surface of a piezoelectric material provides a means of implementing a variety of signal processing devices at frequency ranging from several MHz to a few GHz. In this work, a Miniature SAW device is ...

Two Dimensional Model of a Catalytic Plate Reactor for Methane Steam Reforming Using Different Kinetic Mechanisms

M.A. Mundhwa[1], C.P. Thurgood[1], and B.A. Peppley[2]
[1]Royal Military College of Canada, Kingston, ON, Canada
[2]Queen's University, Kingston, ON, Canada

Coupling of an endothermic reaction and an exothermic reaction using catalytic plate reactor (CPR) is a well known concept for industrial processes such as steam reforming, dehydrogenation and hydrocarbon cracking. In the CPR, the exothermic reaction (e.g., combustion of methane) can provide the necessary heat to drive the endothermic reaction (e.g., steam reforming of methane). The present work ...

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