Determination of Fundamental Frequency of a Thin Rectangular Perforated Plate using COMSOL Multiphysics
S. V. N. B. Prasad, and B. Raghavendra
BITS PILANI K K BIRLA
GOA CAMPUS, India
COMSOL Multiphysics 4.0 is being used to simulate the free vibrations of a plate. The results obtained by simulation in COMSOL are in close proximity to that found by Fast Fourier Transform analyzer and analytical method. As of now the vibration analysis of thin rectangular plates with perforations in rectangular pattern has been carried out. The study of vibration analysis of thin ...
S. Gawade, P. P. Date, and S. B. Sharma
Production Engineering. Dept. SGGS IE&T, Nanded, India
Mechanical Engineering. Dept, IIT, Bombay, India
Electromagnetic forming (EMF) is a typical high speed forming process using the energy density of a pulsed magnetic field to form workpieces made of metals with high electrical conductivity like e.g. aluminium. This forming process can be very advantageous as compared to conventional forming process. EMF process is simulated by a commercial finite element analysis (FEA) solver, COMSOL ...
C. Anandharamakrishnan, R. Gopirajah, and N. Chhanwal
Central Food Technological Research Institute
Freeze-drying is a popular method of producing shelf stable particulate products and is of particular value for drying thermally sensitive materials (volatiles and biological based), which can be heat damaged by higher temperature methods, such as spray-drying. Porous structures are formed by the creation of ice crystals during the freezing stage, which subsequently sublime during the drying ...
R. Singh, and I. Jose
BITS Pilani Goa Campus
Diffuse Optical Tomography (DOT) uses Near Infra-red (NIR) light to monitor physiological changes in internal organs. NIR light being less energetic in nature can be used for continuous monitoring of tumor infected biological tissue, neonatal brain and many such applications where high energy radiation can cause severe damage. The forward problem of DOT, which involves obtaining of the ...
S. L. Pinjare, V. S. Nagaraj, S. N. Savitha, S. Kesari, M. S. Sagar, and K. R. Roshan
Nitte Meenakshi Institute of Technology
The MEMS microphone is also called microphone chip or silicon microphone. The pressure sensitive diaphragm is etched directly into a silicon chip by MEMS techniques and is usually accompanied with integrated preamplifier. Most MEMS microphones are variants of the condenser microphone design. The MEMS microphone has been successfully fabricated and tested in an anechoic chamber. The microphone ...
N. R. Mahesh, and P. Nair
SSN College of Engineering
Tamil Nadu, India
Acoustic metamaterials are structured materials of negative mass density or negative bulk-modulus or both of them. Materials are tailored in sub-wavelength dimensions so as to get these negative properties. This paper compares the result of an experimental investigation of acoustic metamaterial with negative bulk-modulus to its COMSOL modeling. The resonance characteristics of single ...
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 ...
P. S. K. Mylavarapu, and S. Boddapati
Defence Metallurgical Research Laboratory
Syntactic foams are hollow particle filled composites that have recently emerged as attractive materials for use in advanced structural applications in aerospace and defence industry. Ultrasonic characterization of these foams is performed extensively in order to understand the effect of porosity and particle size on the ultrasonic properties such as longitudinal velocity and attenuation. ...
S. Sohail, D. Das, S. Das, and K. Biswas
Electrical Engineering Department, IIT Kharagpur
School of Medical Science and Technology, IIT Kharagpur
Digital microfluidic system based on EWOD (electrowetting-on-dielectric) technology can perform different fluidic operations on the same electrode array by simply modifying control software. One of the major challenges in EWOD device is to address each electrode individually in M x N array of electrode using simple fabrication architecture without compromising in system performance. The ...
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 ...