Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-TH-21

EFFECT OF CONDUCTION ON COMBINED FREE AND FORCED
CONVECTION IN A VENTILATED CAVITY WITH A
HEAT-GENERATING SOLID CIRCULAR BODY

M. A. H. Mamun1, M. M. Rahman2, and Shuichi Nagata1
1Institute of Ocean Energy, Saga University, Japan
2Department of Mathematics, BUET, Bangladesh

ABSTRACT

Numerical simulations of the effect of conduction on combined free and forced convection (mixed convection) heat transfer and fluid flow have been performed in a 2-D ventilated cavity with a finite size and finite conductivity solid circular body. The wall of the cavity is assumed to be adiabatic. Flows are imposed at the bottom of the left wall and exit at the top of the right wall of the cavity. The heat generating body is placed at the center of the cavity. The present study simulates a practical system such as air-cooled electronic equipment with a heat component. The developed mathematical model is governed by the coupled equations of mass, momentum and energy and is solved by employing Galerkin weighted residual finite element method. The computation is carried out for wide ranges of Reynolds number, Richardson number. Various results such as the streamlines, isotherms, heat transfer rates in terms of the average Nusselt number and average fluid temperature in the cavity are presented for different parameters. The results indicate that both flow field and temperature distribution strongly depend on Reynolds number, Richardson number. It is also observed that the mentioned parameters have significant effect on average Nusselt number at the heated surface and average fluid temperature in the cavity.

Keywords: Solid Circular Body, Ventilated Cavity, Mixed Convection And Finite Element Method.

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