技術情報とプレゼンテーション

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.

Design and Simulation of 3D MEMS Piezoelectric Gyroscope using COMSOL Multiphysics®

T.Madhuranath[1], R.Praharsha[1], Dr.K.Srinivasa Rao[1]
[1]Lakireddy Bali Reddy College of Engineering, Mylavaram, Andhra Pradesh, India

MEMS is the leading technology which combines both electronic and mechanical devices on a single microchip. Tracing the position of the object is an important problem in engineering. This can be addressed by Gyroscopes. These sensors are used to find orientation and angular velocity. This paper focuses on 3D MEMS Piezoelectric Gyroscope. COMSOL Multiphysics® is used for designing and ...

Tunable MEMS Capacitor for RF Applications

H. S. Shriram[1], T. Nimje[1], D. Vakharia[1]
[1]BITS Pilani, Rajasthan, India

Radio Frequency MEMS devices have emerged to overcome the problem of high losses associated with semiconductors at high frequencies. A tunable MEMS capacitor is a micrometre-scale electronic device whose capacitance is controlled through different actuation mechanisms which govern the moving parts. It can have electrostatic or electrothermal actuators depending on the functional complexity and ...

Numerical Modeling of Dielectrophoretic Forces Acting upon Biological Cells in Silicon Lab-On-Chip Devices

S. Burgarella, M. Bianchessi, and M. De Fazio
Advanced System Technology, R&I e-Health, STMicroelectronics, Agrate Brianza, Italy

Dielectrophoresis (DEP) is a promising method for the automated separation of biological cells in a miniaturized format. This technology allows cells to be manipulated electronically while suspended in a microfluidic channel embedded in a silicon lab-on-chip. In this work, several dielectrophoretic configurations have been designed and fabricated using micro-electro-mechanical-systems (MEMS) ...

Sensitivity Optimization of Microfluidic Capacitance Sensors

S. Satti[1], M. Baghini[1]
[1]Indian Institute of Technology Bombay, Mumbai, Maharashtra, India

As a part of a lab-on-chip-device, more often it is required to measure dielectric constant of the fluid. For this purpose it is necessary to develop a sensor whose size is compatible with microfluidic channel. The work, presented in this paper, studies effect of the parameters influencing sensitivity of such a sensor and ultimately optimizes these dimensions to maximize the sensitivity. We ...

Simulation of ZnO Enhanced SAW Gas Sensor

H. du Plessis[1], W. Perold[1]
[1]University of Stellenbosch, Stellenbosch, South Africa

Surface acoustic wave (SAW) devices are widely used for their sensing capabilities and gas sensing is only one of many uses. There is an ever increasing need to make them as effective as possible by adding nanomaterials to the device. In this study a two-port delay-line structure with 128YX lithium niobate was simulated with COMSOL Multiphysics® in the form of a 2D cross-section. ZnO nanopillars ...

Optimizing the Performance of MEMS Electrostatic Comb-Drive Actuator with different Flexure Springs

S. Gupta[1], T. Pahwa[1], R. Bansal[1], V. Bansal[1], B. Prasad[1], D. Kumar[1]
[1]Electronic Science Department Kurukshetra University, Kurukshetra, Haryana

A new design of electrostatic comb drive actuator is presented in this paper by using different spring designs and with different folded beam lengths. An increased displacement of lateral comb drive actuator will subsequently be accomplished with the same actuation voltage. Stress distribution over different spring designs are simulated by COMSOL 3.5a using a standard comb drive with 4 movable ...

Design and Simulation of a Nano-Wire Based Piezoresistive Pressure Sensor

S. A. Selvin, N. B. Moorthy, G. Anju, and M. Alagappan
PSG College of Technology
Coimbatore
Tamil Nadu, India

This paper chalks out the design and performance of a piezo resistive surface micro machined circular diaphragm based pressure sensor. A structural deformation in the piezo resistive nano structure placed above the diaphragm will result in varied current density, which is in direct accordance with the applied pressure. This effect relies on the principle of piezo resistivity and employing a nano ...

Modeling Drug Release from Materials Based on Electrospun Nanofibers

P. Nakielski[1], T. Kowalczyk[1], T.A. Kowalewski[1]
[1]Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw, Poland

Comprehensive studies of drug transport in nanofibres based mats have been performed to predict drug release kinetics. The paper presents our approach to analyze the impact of fibers arrangement, one of the parameters varied in our parallel experimental studies. COMSOL Multiphysics® has been used to assess the impact of the various purposed arrangements of fibers within the mat. Drug release ...

Simulation of a One-Port SAW Resonator using COMSOL Multiphysics

R. Krishnan, H.B. Nemade, and R. Paily
Indian Institute of Technology, Guwahati

In this paper, we discuss simulation of one-port Surface Acoustic Wave (SAW) resonators using COMSOL Multiphysics. Resonator action can be achieved in one of the two ways; a single Inter-digital Transducer (IDT) having several fingers over a piezoelectric substrate or a short IDT with reflecting gratings at the ends of the IDT. We have modeled a Rayleigh wave type SAW device choosing YZ ...

Implementation of ALE Moving Mesh for Transient Modeling of Nanowire Trajectories Caused by Electrokinetic Forces

S.M. Davison, and K.V. Sharp
Pennsylvania State University

Moving nanowires through microfluidic channels under electrokinetic forces can be a valuable technique to aid in the fabrication of certain devices. The trajectories of a nanowire under the influence of an externally applied electric field have been modelled through a straight channel, through a converging channel, and around a 90° corner. In a straight channel, a nanowire initially ...

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