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Computational Fluid Dynamicsx

Numerical Study of Microscale Heat Sinks Using Different Shapes and Fluids

H. Garg[1], A. K. Lall[2], Nidhi[3], V. S. Negi[1]
[1]Central Scientific Instruments Organisation, Chandigarh, India
[2]PEC University of Technology, Chandigarh, India
[3]UIET, Punjab University, Chandigarh, India

Microchannel heat sinks designed for applications in electronic cooling and having microscale heat transfer combine the attributes of high material compatibility, high surface area per unit volume ratios, and large potential heat transfer performance with a highly sophisticated and ... Mehr lesen

Studying Magnetohydrodynamic Effects in Liquid Metal Flow Under Transverse Magnetic Field Using COMSOL Multiphysics®

S. Sahu[1], R. Bhattacharyay[1], E. Rajendrakumar[1]
[1]Institute for Plasma Research, Bhat, Gandhinagar, India

Liquid metals are foreseen as a multipurpose coolant in fusion blanket systems. However, the strongly magnetic environment of the fusion reactor hinders the regular flow of the liquid metal. It interacts with transverse magnetic field and produces a Lorentz force opposing the flow, ... Mehr lesen

Miscible Viscous Fingering of Pushed Versus Pulled Interface

S. Pramanik[1], M. Mishra[1]
[1]Indian Institute of Technology Ropar, Rupnagar, Punjab, India

Viscous fingering (VF) instability has been extensively studied over past several decades in the context of various industrial, environmental and chemical processes. We try to model miscible VF at pushed or pulled interfaces using COMSOL Multiphysics®. We study the effect of the positive ... Mehr lesen

External Field Induced Flow Patterns in Microscale Multiphase Flows

D. Bandyopadhyay[1], A. Sharma[1], S. Timung[1], V. Tiwari[1], T. K. Mandal[1]
[1]Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

The study of multiphase flows inside the microfluidic devices has received much attention recently because of its applications in heat and mass transfer, mixing, microreaction, emulsification and most importantly in MEMS and lab-on-a-chip. We study the influence of an electric field on ... Mehr lesen

Effects of Forced Airflow Cooling on Laser Beam Heating of Volume Bragg Gratings

S. Kaim[1], B. Anderson[1], G. Venus[1], J. Lumeau[1], V. Smirnov[2], B. Zeldovich[1], L. Glebov[1]
[1]CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA
[2]OptiGrate Corp, Oviedo, FL, USA

Forced airflow cooling of a Volume Bragg Grating heated by a laser beam was investigated by means of simulation with COMSOL Multiphysics®. In addition to air cooling of unrestricted airflow, a case of airflow directed by limiting glass plates was investigated. A number of temperature ... Mehr lesen

Numerical Investigation for the Effect of Guide Panel on Heat Transfer from Steel Containment

Priyanshu Goyal[1], I. Thangamani[1], V. Verma[1], V.M. Shanware[1], R. K. Singh[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

In a nuclear reactor, the containment is the last barrier for the release of radioactivity during severe accident conditions. Containment material can be concrete or steel or steel-lined concrete. Steel containments have a high load bearing capacity and a high degree of leak tightness at ... Mehr lesen

Transport of Cadmium through Molten Salt to Argon Cover Gas in Electrorefiner

K.Revathy[1], S. Agarwal[1], B. Muralidharan[1], G. Padmakumar[1], K. K. Rajan[1]
[1]Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

Electro refining is one of the important step in the Pyro processing nuclear spent fuel with molten salt. The electro refiner is a process vessel consists of anode ,cathodes and stirrers and ultra –high pure argon gas is provided at the top for inert atmosphere and at the bottom a ... Mehr lesen

Enthalpy Porosity Method for CFD Simulation of Natural Convection Phenomenon for Phase Change Problems in the Molten Pool and its Importance during Melting of Solids

Priyanshu Goyal[1], Anu Dutta[1], V.Verma[1], I. Thangamani[1], R.K. Singh[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

Shielded transportation casks are commonly used for transportation and storage of radioactive waste materials. Design approval of such casks by regulatory authority is subject to its compliance with a thermal test (among other tests) Due to exposure of cask to fire , there is a ... Mehr lesen

Numerical Investigation of Strouhal Frequencies of Two Staggered Bluff Bodies

Eswaran M[1], P. Goyal[1], Anu Dutta[1], G.R. Reddy[1], R. K. Singh [1], K.K. Vaze[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

A 2-D unsteady viscous flow around two cylinders is studied by numerical solutions of the unsteady Navier-Stokes equations with a finite element formulation using COMSOL Multiphysics®. The results of a numerical investigation of the Strouhal frequencies of two identical, stationary, ... Mehr lesen

AC Electroosmosis and Dielectrophoresis for Trapping Spherical Particles between Rectangular and Triangular Electrodes

S. Narayan[1], H. Francis[1], S. Ghonge[1], D.N. Prasad[1], A. Sethi[1], S. Banerjee[1], S. Kapur[2]
[1]Department of Physics, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
[2]Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India

We describe methods and results of simulations done for predicting behavior of particles in an aqueous solution under an applied AC electric field on electrodes of rectangular and triangular shapes. Here the two major effects which come into play are Dielectrophoresis and AC ... Mehr lesen

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