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.

FEM Analysis of MEMS Capacitive Presure Sensor with Segmented Boss Structure for Diaphragm

A. K. Ramesh [1], P. Ramesh [1],
[1]College of Engineering Munnar, Munnar, Kerala, India

Microelectromechanical system (MEMS) based capacitive pressure sensor designs with improved sensitivity is always a matter of great concern and the recent developments in such a design is the MEMS capacitive pressure sensor with bossed diaphragm.The bossed diaphragm model improves sensitivity but it compromises the range of operation which lead to a new design with the segmented boss structure. ...

Optimization of Device Geometry of a Fully-Implantable Hearing Aid Microphone

A. Dwivedi [1], G. Khanna [1],
[1] National Institute of Technology Hamirpur, Himachal Pradesh, India

The hearing impairment is affecting more than 360 million people all over the world.In India alone, 63 million people suffer from the significant auditory loss. Conventional hearing aids suffer from reliability, practicality and social stigma concerns. The totally implantable devices provide freedom from the social and practical difficulties of using conventional hearing aids. The paper presents ...

Thermally Induced-Noise Reduction Using an Electrostatic Force Feedback

H. Lee, and J.V. Clark
Purdue University, West Lafayette, IN, USA

In this paper we present a method to mitigate the effect of thermally-induced noise in Micro-Electro-Mechanical Systems (MEMS) through a force feedback circuit. Inherent noise-induced vibrations, which would be inconsiderable in macro scale, are considered as a limitation in micro- and nano- scale since it diminishes the high performance of MEMS devices. For instance, depending on the stiffness ...

Multiphysics Modeling of Implantable Micro-Electrode for Diagnostic and Therapeutic Applications in Neural Disorders

H. W. Ferose, R. G. Prasath, M. Alagappan, and G. Anju .
PSG College of Technology
Tamil Nadu, India

Neural disorders like epilepsy, Parkinson’s disease and Alzheimer’s disease have become a major area of concern because of their complexity and the huge number of occurrences. At present, most of the treatments are based on drugs and external nerve stimulation demanding critical care. This study aims at the design and simulation of an implantable micro-electrode which can lead to better ...

Modeling of Vibrating Atomic Force Microscope´s Cantilever within Different Frames of Reference

E. Kamau, and F. Voigt
University of Oldenburg, Germany

Cantilever vibration modes were simulated with COMSOL Multiphysics. In the 1st approach the model consisted of an excitation piezo, a holder plate and a chip where the cantilever was mounted on. A sinusoidal voltage signal was applied to the piezo in the simulation, which resulted in movements of the holder plate and finally led to the excitation of the cantilever. In the 2nd approach the model ...

Multiphysics Modelling of a Micro Valve

F. Bircher[1] and P. Marmet[1]

[1]Institute of Print Technology, Bern University of Applied Sciences, Burgdorf, Switzerland

Electromagnetic micro valves are currently developed empirically or the different physics are treated separately. To accelerate the development-process and for a better understanding of the overall system, a multiphysics simulation is built up. This simulation considers the electromagnetics, the electronics (including the control of the process), the mechanics and the fluidics with respect to ...

Design and Analysis of Micro-tweezers with Alumina as Gripper Using COMSOL Multiphysics

V. S. Selvakumar, M. S. Gowtham, M. Saravanan, S. Suganthi, and L. Sujatha
Rajalakshmi Engineering College
Chennai, India

Micro-tweezers have been widely investigated because of their extensive applications in micro-fluidics technology, microsurgery and tissue-engineering. It has been reported that thermal actuation provides greater forces and easier control when compared to electrostatic micro actuation. In this paper, we discuss about the effects of Alumina as gripper on the operation of micro tweezers. The ...

Investigation on MEMS Based Thermal Sensor for Cancer Detection

A. V. Lakshmi[1], K. C. Devi[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

This paper presents the design and simulation of a thermal sensor using COMSOL Multiphysics® software for the detection of low body temperature syndrome which can allow the early detection of cancer. This sensor is made of an alloy consisting of two materials with different coefficients of thermal expansion. The main objective of this work is to investigate the structural change in the sensor ...

Design and Analysis of Stacked Micromirrors

S. Park, S. Chung, and J. Yeow

University of Waterloo, Systems Design Engineering, Waterloo, Ontario, Canada

A micromirror or a torsional actuator in general has been proven to be one of the most popular actuators fabricated by Micro-Electro-Mechanical System (MEMS) technology in many industrial and biomedical applications such as RF switches, a laser scanning display, an optical switch matrix, and biomedical image systems. In this paper, two stacked micromirrors are presented and analyzed to show ...

The Fabrication of a New Actuator Based on the Flexoelectric Effect

S. Baskaran[1], S. Thiruvannamalai[1], N. Ramachandran[1], F.M. Sebastian[1], and J.Y. Fu[1]
[1]State University of New York at Buffalo, Buffalo, New York, USA

This paper presents a novel methodology towards the design, analysis, and the fabrication process involved in developing a cost effective method to create a piezoelectric actuator by means of the flexoelectric effect. The basic physical equations of the flexoelectric effect and the qualitative analysis of the flexoelectric actuator are done using COMSOL Multiphysics. This effect is used to align ...