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.

Development of Surface Micromachinable Capacitive Accelerometer using Fringe Electrical Field

S. Aoyagi1, and Y.-C. Tai2
1Robot & Microsystem Laboratory, Kansai University, Osaka, Japan
2Caltech Micromachining Laboratory, California Institute of Technology, Pasadena, USA

A new type of accelerometer is demonstrated which consists of a dielectric seismic mass and a comb-shaped planar capacitor underneath it. The simple structure of the device allows the use of polymer Parylene as the proof mass, so the technology is greatly simplified and only surface micromachining is required. The measuring principle is detecting capacitance change according to the dielectric ...

Parylene Accelerometer Utilizing Spiral Beams

S. Aoyagi1, K. Makihira1, D. Yoshikawa1, and Y.-C. Tai2
1Robot & Microsystem Laboratory, Kansai University, Osaka, Japan
2Caltech Micromachining Laboratory, California Institute of Technology, Pasadena, USA

This paper reports on a Parylene accelerometer utilizing spiral beams. Since Parylene has intrinsic tensile stress, the resonant frequency of the sensor structure is higher than under the case with no tensile stress. Considering the sensitivity of the accelerometer, the investigation of a suspended structure supported by straight beams is carried out both theoretically and experimentally.As a ...

COMSOL Multiphysics as a Tool for Researching Work on Plasma and Plasma Processing

Tatsuru Shirafuji
Associate Professor
Faculty of Engineering
Deparment of Electronics
Kyoto Institute of Technology

This presentation investigates discharge and plasma, including plasma processing of materials and electrical discharge, and also presents chemical reactions and thin film deposition, including transport, combining the COMSOL Multiphysics Chemical Engineering Module and the COMSOL Reaction Engineering Lab, which provides visualization of spatio-temporal behavior of chemical species. Keynote ...

Vibration Analysis of a Cylindrical Ultrasonic Linear Microactuator using COMSOL Multiphysics

Seiichi Hata
Associate Professor
Frontier Collaborative Research Center
Tokyo Institute of Technology

In this presentation, a new type of cylindrical ultrasonic linear microactuator (CULM) is presented. Using COMSOL Multiphysics, a modal analysis, a frequency response analysis, and a transient analysis are carried out for the model of the stator. A comparison with experimental results shows agreement for the frequency values. Keynote speaker's biography:Seiichi Hata has been an Associate ...

Development of an Optically-Controlled Biochip

S. Maruo
Yokohama National University, Japan

In this presentation, we present our work on optically controlled microfluidic systems. This includes both numerical simulations and experiments.

Modeling of the Selective-area Epitaxial Growth of Compound Semiconductors and Application to the Design of Integrated Optical Devices

Masakazu Sugiyama
Associate Professor
Department of Electronics Engineering
University of Tokyo

In this presentation, selective-area growth (SAG) is simulated and the strain distribution in the selectively-grown area is estimated using the simulation. It is found that strain control is possible and polarization-insensitive integrated devices can be designed. Keynote speaker's biography:Masakazu Sugiyama received a PhD in Chemical Systems Engineering in 2001 and has been an Associate ...

Design of Soft Actuators using Ionic Polymer Metal Composites

D. M. G. Preethichandra1, B. G. L. T. Samaranayake2, A. M. U. S. K. Alahakoon2 and K. Kaneto1
1Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Hibikino, Wakamatusu-Ku, Kitakyushu-Shi, Japan
2Department of Electrical and Electronics Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya, Sri Lanka

This paper characterizes and models the bending motion of the strip-type Ionic Polymer Metal Composites (IPMC) actuators using the theory of Large Deflections of Beams. From here it derives a thermal analogy. The mathematical model has been experimentally verified for an actuator with the dimensions 25mm×2.6mm×0.44 mm.Theoretical and experimental results are compared to show the validity of the ...

Numerical Analysis of Coupled Electromagnetic and Thermal-conduction Fields

H. Osaki
The University of Tokyo, Japan

In this work, the pulsed-field magnetization of high-temperature bulk superconductors is investigated.The presentation is written in Japanese.

Optimal Design of Microtissue Array Based on Oxygen Supply

T. Kanamori, S. Sugiura, and K. Sumaru
Research Center of Advanced Bionics, National Institute of Advanced Industrial Science and Technology, Higashi, Tsukuba, Japan

A microtissue array chip is planned to be utilized as a new tool for drug development and anticancer-drug screening.In this study, we show that some mechanisms to supply oxygen and glucose should be equipped within the chip.This paper is partly written in Japanese.

Analysis of Heat Conduction across Multi-layer Materials

T. Baba
AIST: National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Japan

A comparison of the thermal diffusion solution about "Response Function Method" and "COMSOL Multiphysics".This presentation is written in Japanese.

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