Effect of Buoyancy on Turbulent Mixed Convection Flow Through Vertical and Horizontal Channels

N, Satish and K, Venkatasubbaiah and R, Harish and Sengupta, T K and Lele, S K and Sreenivasan, K R and Davidson, P A (2016) Effect of Buoyancy on Turbulent Mixed Convection Flow Through Vertical and Horizontal Channels. In: IUTAM Symposium on Advances in Computation, Modeling and Control of Transitional and Turbulent Flows, Dec 15-18, 2014, Goa, India.

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The effect of buoyancy on turbulent mixed convection flow through vertical and horizontal channels has been numerically studied. Turbulence is modeled by Reynolds averaged Navier - Stokes equations (RANS) with standard k - epsilon turbulence model. The present analysis is valid when the buoyancy force effects are small compared with the forced convection effects. The mixed convection flow problem is formulated by two dimensional unsteady incompressible flow with the buoyancy term modeled by Boussinesq approximation. The governing equations are solved by high accuracy compact finite difference schemes with four stage Runge-Kutta method for time integration. Results are reported for Reynolds number of 6000 with Richardson number varied from 0 to 0.5. The velocity, temperature profiles and average Nusselt number values are presented. The buoyancy shows significant effect on the flow and heat transfer characteristics in vertical channel in comparison with the horizontal channel. The effects of heated plate velocity relative to fluid velocity in a channel are reported. The present results are matching well with the experimental results available in the literature.

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IITH Creators:
IITH CreatorsORCiD
K, VenkatasubbaiahUNSPECIFIED
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Turbulent mixed convection; Assisting flow; Opposing flow; Richardson number
Subjects: Physics > Fluid mechanics
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Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Team Library
Date Deposited: 03 Oct 2016 08:34
Last Modified: 03 Oct 2016 08:34
URI: http://raiith.iith.ac.in/id/eprint/2794
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