Mixed Convective Flow and Heat Transfer Through a Channel with Surface Mounted Obstacles
Arun K. Sahaa and Twinkle Malik
Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur 208 016, India.
aaksaha@iitk.ac.in
ABSTRACT
In this study computations are performed for mixed convective flow and heat transfer in horizontal channel with built in obstacles on one of the channel walls. The channel blockage is taken to be 20%. Two-dimensional time dependent Navier-Stokes and energy equations are solved in a Cartesian frame work using higher order discretization. A fixed Reynolds number of 600 and Prandtl number of 0.71 has been used while Richardson number is varied between –1.0 to 1.0. The flow and heat transfer shows good correlation and intense mixing is observed downstream of the obstacle. The heat transfer is observed to be higher for the positive buoyancy while no significant variation is observed for negative buoyancy or Richardson number.
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