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 ...
S. Logeshkumar, L. Lavanya, G. Anju, and M. Alagappan
PSG College of Technology
Tamil Nadu, India
In the model silicon nanorods are designed as cantilever array and coated with thin film of aluminum or aluminum nitride, to be characterized, thus, adding a detectable mass and altering the cantilever resistance to bending. The simulated results show that when films of different thickness are placed on the cantilever, there is a corresponding change in the resonant frequency and the ...
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.
S. V. Kulkarni
Indian Institute of Technology
S. V. Kulkarni a Professor in Electrical Engineering Department, Indian Institute of Technology, Bombay, India. Previously, he worked at Crompton Greaves Limited and specialized in the design and development of transformers up to 400 kV class. He has authored book \"Transformer Engineering: Design and Practice\" published by Marcel Dekker, Taylor & Francis Group. The author of more than 120 ...
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 ...
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 ...
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 ...
S. Agarwal, S. P. Ruhela, B. Muralidharan, B. P. Reddy, B. K. Sharma, K. Nagarajan, C. A. Babu, and K. K. Rajan
Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research
Chemistry Group, Indira Gandhi Centre for Atomic Research
HBNI & CDG, Indira Gandhi Centre for Atomic Research
An inactive Demonstration facility for the integrated pyroprocess, named High temperature Electrorefining (HTER) facility is in developing stage. This facility is equipped with several types of pyroprocess equipment such as electro-refiner, salt and cadmium distillation equipment, scraping equipment and tilting equipment inside an Argon cell. To operate the argon cell safely, all generated ...
Venkataraghavan is the Discover Category Leader, Water, working at the interface of Science, Technology and Business, for developing solutions and products for water purification at Unilever R&D, Bangalore. He joined Unilever in 2002 and earlier worked in interfacial science, materials science and electrodynamics for the Laundry Category. Venkataraghavan also had a stint with Unilever Technology ...