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.

MEMS Resonator for RF Applications

V. Harshey
Visvesvaraya National Institute of Technology
Maharashtra, India

Vibrating mechanical tank components, such as quartz crystals and surface acoustic wave (SAW) resonators with Q’s in the range of 10e3–10e6, are widely used to implement high-Q oscillators and band pass filters in the radio frequency (RF) and intermediate frequency (IF) stages of communication transceivers. This paper will discuss designing of resonator and effects of various parameter on the ...

Effect of Geometry of the Grooves on the Mixing of Fluids in Micro Mixer Channel

V. Ranjan[1], A. Kumar[1], G. Prakash[1], R. Mandal[1]
[1]Department of Mechanical Engineering, Indian School of Mines, Dhanbad, Jharkhand, India

Understanding the flow fields at the micro-scale is a key to develop methods of successfully mixing fluids for micro-scale applications. This paper investigates flow characteristics and mixing of three different geometries in micro-channel. A Circular groove micro mixer has been designed and simulated. One such channel is shown in Figure1. The geometry of the channels taken was rectangular with ...

Design and Simulation of Piezoelectric Ultrasonic Micro Motor

P. Patel[1], P. Manohar[1]
[1]Electrical and Electronics Department, M. S. Ramaiah Institute of Technology, Bangalore, Karnataka, India

Micro machined motors are a recent development in the domain of electrical machines. Compared to the conventional electromagnetic motors, micro machined motors offer high torque at lower speed, and are compact in nature. This makes them suitable for applications in the field of microsatellite, biomedical, micro robot, automobile, and auto focusing camera. The present work describes the design ...

Efficient Anchor Design for Quality Factor Enhancement in a Silicon Nitride-on-Silicon Lateral Bulk Mode Resonator

U. Rawat[1], A. DasGupta[1], D. R. Nair[1], V. V. Pasula[1]
[1]Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

Anchor loss causes a reduction in the quality factor of high frequency micromechanical resonators. This study illustrates the importance of anchor design in mitigating anchor loss in high frequency resonators. The performances of two different anchor configurations for a silicon nitride-on-silicon lateral mode bar resonator have been compared using simulations performed in COMSOL Multiphysics®. ...

Design and Analysis of 3D Capacitive Accelerometer for Automotive Applications

G. Vijila, S. Vijayakumar, M. Alagappan, and A. Gupta
PSG College of Technology
Tamil Nadu, India

This paper projects a novel 3D capacitive accelerometer design to identify a severe accident and initiate airbag deployment systems. It will detect the rapid negative acceleration of the vehicle to avoid the severity of the collision. Such a device demands excellent performance in terms of sensitivity, noise immunity, linearity, bias and scale factor stability over time and environmental ...

Nanoscale Heat Transfer using Phonon Boltzmann Transport Equation

S. Sihn[1,2], and A.K. Roy[2]

[1]Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio, USA
[2]University of Dayton Research Institute, Dayton, Ohio, USA

COMSOL Multiphysics was used to solve a phonon Boltzmann transport equation (BTE) for nanoscale heat transport problems. One dimensional steady-state and transient BTE problems were successfully solved based on finite element and discrete ordinate methods for spatial and angular discretizations, respectively, by utilizing the built-in feature of the COMSOL, Coefficient Form of PDE.

Development of MEMS-based Pressure Sensor for Underwater Applications

Aarthi E[1], Pon Janani S[1], Vaidevi S[1], Meenakshi Sundaram N [1], Chandra Devi K[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

Blind cave fish are capable of sensing flows and movements of nearby objects even in dark and murky water conditions with the help of arrays of pressure-gradient sensors present on their bodies called lateral-lines. To emulate this functionality of lateral-lines for autonomous underwater vehicles, an array of polymer MEMS pressure sensors have been developed that can transduce underwater ...

MEMS Based Silicon Load Cell for Weighing Applications

D. Chauhan[1], B. D. Pant[2]
[1]Kurukshetra University, Kurukshetra, Haryana, India
[2]CSIR- Central Electronics Engineering Research Institute, Pilani, Rajasthan, India

Load cells are force sensors, which are used in weighing equipment. The objective of this work is to develop MEMS based load cell. In this work two different load cell designs were simulated. First design is based on compressing a meander like polysilicon strain gage for the measurement of high forces up to 10kN. Second design is based on MEMS pressure sensor consisting of membrane, on which ...

A Computational Approach for Simulating p-Type Silicon Piezoresistor Using Four Point Bending Setup

T.H. Tan[1], S.J.N. Mitchell[1], D.W. McNeill[1], H. Wadsworth[2], S. Strahan[2]
[1]Queen's University Belfast, Belfast, United Kingdom
[2]Schrader Electronics Ltd, Antrim, United Kingdom

The piezoresistance effect is defined as change in resistance due to applied stress. Silicon has a relatively large piezoresistance effect which has been known since 1954. A four point bending setup is proposed and designed to analyze the piezoresistance effect in p-type silicon. This setup is used to apply uniform and uniaxial stress along the crystal direction. The main aim of this work is to ...

Effective Mass Calculations Using COMSOL Multiphysics® for Thermomechanical Calibration

B. D. Hauer[1], C. Doolin[1], K. S. D. Beach[1], J. P. Davis[1]
[1]University of Alberta, Edmonton, AB, Canada

Over the past few decades, nano/micro-mechanical resonators have experienced tremendous improvements in measurement sensitivity. In order to ensure accuracy, it is crucial that each nano/micro-mechanical device is properly calibrated. Thermomechanical calibration provides a noninvasive calibration method by which scaling issues can be circumvented. Each resonator is modeled as a damped harmonic ...