V. S. Nagaraja, N. Suma, and S. L. Pinjare
Nitte Meenakshi Institute of Technology
The tunable capacitor (variable capacitor) is one of the most important and components in filters, Phase shifters, VCO etc. A tunable capacitor can also be built using electro – thermal actuating mechanism. Compared to electro static, tunable capacitors actuated by thermal actuators have several advantages like lower driving voltages. The performance of thermal actuator becomes a key factor ...
V. Sista, and E. Bhattarchaya
Microelectronics and MEMS Lab
Department of Electrical Engineering
Indian Institute of technology Madras
A MEMS based Knudsen’s pressure gauge working in the range of 1e-5 mbar to 10 mbar is designed and simulated in COMSOL. The working principle is based on Knudsen’s forces that arise when two plates are held at different temperatures and their separation is comparable to the mean free path of the ambient gas molecules. The forces change the separation between the plates and capacitance between ...
H. T. D. Grigg, and B. J. Gallacher
Newcastle upon Tyne
Tyne and Wear, UK
This paper presents ongoing research aimed at development of a MEMS magnetometer capable of nanoTesla sensitivity. Such a device would pave the way for inertial-grade MEMS IMUs. A resonant sensor is proposed, based on a Xylophone Bar sense element, and is analysed both directly and via COMSOL. Mode shapes and frequencies are found as functions of geometric parameters, and the results used ...
In recent years, optical manipulation using optical radiation pressure has been widely studied. In this study, the radiation pressure exerted on various kinds of microscopic objects with different laser beams was evaluated by COMSOL Multiphysics software. By changing beam shapes, microscopic objects can be trapped and rotated. This paper is in Japanese.
3D Stationary and Temporal Electro-Thermal Simulations of Metal Oxide Gas Sensor Based on a High Temperature and Low Power Consumption Micro-Heater Structure
N. Dufour, C. Wartelle, P. Menini
LAAS-CNRS, Toulouse, France
Renault, Guyancourt, France
The aim of this work was to simulate the electro-thermal behavior of a micro-hotplate used as a gas sensor, in order to compare the obtained results with a real structure. The structure has been designed in 3D and a stationary and a temporal study has been realized.
The Effects of the Electrical Double Layer on Giant Ionic Currents through Single Walled Carbon Nanotubes
G. Zhang[,][,], S.L. Bearden 
Department of Bioengineering, Clemson University, Clemson, SC, USA
Department of Electrical and Computer Engineering, Clemson University, Clemson, SC, USA
Institute for Biological Interfaces of Engineering, Clemson University, Clemson, SC, USA
Electrofluidic transport through a single walled carbon nanotube (SWCNT) is enhanced by electroosmosis. Electroosmosis is made possible in these devices by the combination of a large slip length within SWCNTs and the interfacial potential at the solution/nanotube interface. A computational model of a SWCNT device was developed using COMSOL Multiphysics to investigate the complete electrical ...
J.J. Gangloff Jr., W.R. Hwang, S.G. Advani
Center for Composite Materials, Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
School of Mechanical Engineering, Gyeongsang National University, Jinju, Gyeongsangnam-do, Korea
Voids in composite materials can lead to degraded structural performance. The following is a study of voids or bubbles in uncured viscous polymer resin during composites processing. The goal is to determine if voids can successfully migrate towards vacuum pathways, coalesce with the pathways, and escape. Inherent to the coalescence process is the drainage and rupture of the resin thin film ...
H. Schweiger, T. Göstenkors, R. Bau, D. Zielke
Dept. Engineering Sciences and Mathematics, University of Applied Sciences Bielefeld, Bielefeld, Germany
In this paper we want to figure out the development of a capacitive acceleration-sensor system with the FEM-Method. The sensor-system is in the position to detect accelerations in the range of ±20 g. Furthermore the sensor-element contains a printed RF-inductance, which is used for contactless data transfer. On the one hand the simulation of the L-C-oscillating circuit using the RF Module of ...
Analysis & Design Optimization of Laterally Driven PolySilicon Electro-thermal Microgripper for Micro-objects Manipulation
T. Pahwa, S. Gupta, V. Bansal, R. Narwal, B. Prasad, D. Kumar
Electronic Science Department, Kurukshetra University, Kurukshetra, India
Micro-grippers find applications in micro-robotics, microsurgery, micro-fluidics, micro-relays, assembling and miniature medical instrumentation. Actuation principle involved may be electrothermal, electrostatic, piezoelectric, shape memory and electromagnetic. It has been found that thermal actuation provides greater displacement at low voltages when compared to other mechanisms. A 3-D ...
Multiphysics Modeling and Simulation of MEMS based Variometer for Detecting the Vertical Speed of Aircraft in Avionics Applications
K. Umapathi, K. Sukirtha, C. Sujitha, K. A. Noushad, Venkateswaran, R. Poornima, R. Yogeswari
United Institute of Technology, Coimbatore, Tamil Nadu, India
Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu, India
The objective of this work is to develop a MEMS based Variometer to measure the vertical speed and to sense the instantaneous rate of climb or descent in Aircrafts to meet the miniaturization requirements in avionics industry. The design consists of dielectric material in between two micro electrodes. The micro diaphragm is placed on one of the electrode. As the aircraft changes altitude, the ...