R. C. Thiagarajan
ATOA Scientific Technologies Private Limited
Ultrasonic acoustic waves usually encounter interfaces with significant impedance mismatch in practical medical or industrial imaging applications. A transparent interface can help to improve the performance of medical and industrial imaging and overall innovative applications. Similarly, a broadband total reflection interface can help to improve the architectural or transportation barrier ...
Effect of Bed Diffusion and Operating Parameters on Char Combustion in the Context of Underground Coal Gasification
S. Mahajani, and G. Samdani
Indian Institute of Technology Bombay
Char combustion is one of the most important reactions in the process of Underground Coal Gasification (UCG). Experiments are performed in a boat reactor under near isothermal condition to demonstrate effects of heat and mass transfer and bed diffusion through ash layer. To obtain a complete overview of boat experiments and to further get insights, CFD analysis of boat reactor is performed using ...
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 ...
BITS Pilani K K BIRLA GOA CAMPUS
The actuator comprises of a temperature sensitive composite deflecting beam, a piezoelectric substrate and a field effect transistor. The temperature rise causes an expansion in the composite beam thereby causing it to deflect. The deflecting beam impinges on the piezoelectric crystal and generating voltage. Response curves for the deflection versus temperature for temperature ranges ...
M. Ramya, R. P. S. Valli, R. Vidya, G. Anju, and M. Alagappan
PSG College of Technology
Tamil Nadu, India
In this study, a biomimetic vibrating 3D MEMS Gyroscope is designed, consisting of two circular diaphragms with a club shaped structure placed over one of them. This MEMS based vibrating gyroscope was modeled and simulated using COMSOL Multiphysics 4.1 - MEMS module. The purpose of the research was to develop an effective gyroscope for guidance and control of mobile robots. The simulated ...
R. Pushpangadan, S. S. Dimble, and S. P. Duttagupta
A three Dimensional model of the PEM Fuel cell is implemented using COMSOL Multiphysics and the channel width is varied to study the performance.Effect of channel width on the performance of the cell is studied by varying the width of the channel and keeping channel width to rib ratio constant at 1. Rib width is the width of the GDL area which is not covered by the channel. All other parameters ...
Pranay Goel received his B. Tech. in Engineering Physics from IIT Bombay, and MS and PhD in Physics from the University of Pittsburgh in 2003. He went on to two postodoctoral positions, the first at the Mathematical Biosciences Institute, The Ohio State University, and another at the Laboratory of Biological Modeling, The U.S. National Institutes of Health. He has been with IISER Pune since ...
Analysis and Optimization of Dual Arm, Center Excited, Surface Micro-machined Archimedean Spiral Antenna with Improved Wideband Characterestics
G. Miranda, N. S. Pamidighantam, R. V. Iyer, S. Shukla, P. Suresh, and P. M. Soundarajan
Department of Telecommunications, PESIT, Bangalore,Karnataka,India
Department of Science and Humanities, PESIT, Bangalore,Karnataka,India
An Archimedean Spiral antenna is the common frequency independent antenna which have very large bandwidth. Archimedean Spiral antenna are circularly polarized and typically have radiation patterns with peaks perpendicular to the plane of the spiral. Micro-machining techniques improves the bandwidth characteristics and the radiation efficiency of the antenna. Simulations and results with ...
Visvesvaraya National Institute of Technology
In this paper , lab on chip (LoC) is proposed to detect an E.coli bacteria in water. LoC is a chip of size ranges from millimeter to few centimeter in which we can combine laboratory functions. The main components in lab on chip are micro fluidic structure, functionalized sensing block , measurements (interface)system. The microfluidic structure and sensing block is to be simulated in COMSOL ...
K. Singh, N. Kothari, and S. Choudhary
Electronics and Communication Engineering Department
Geetanjali Institute of Technical Studies
This paper presents the ill-effects of EM exposure through experiment, simulation and modelling using COMSOL Multiphysics. Biological Effects of microwave radiations on living creatures are studied supported with the practical results.