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

ICME09-TH-02

NATURAL CONVECTION AND RADIATION IN CIRCULAR AND
ARC CAVITY

Naheed Ferdous1, Md. Tofiqul Islam 2, Md. A. Hasan Mamun1
1Department of Mechanical Engineering, Bangladesh University of Engineering and Technology,
Dhaka, Bangladesh.
2Department of Mechanical Engineering, Wayne State University, Detroit, USA

ABSTRACT

The radiation effect of gray surfaces on multiple steady-state solutions obtained in circular and arc-square inclined enclosure filled with air has been investigated numerically, by a finite volume procedure. The left and right surfaces of the cavity are, respectively, heated and cooled at constant temperatures, while its horizontal walls are adiabatic. Parameters of the problem are the Rayleigh number Ra(102 > Ra >106), the inclination angle γ (0 to 90◦), aspect ratio equal to 1 and the surface emissivity (0 <ε< 1).

Keywords: Constant Temperature, Circular And Arc Cavity, Nusselt Number, Radiation

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