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

ICME09-TH-10

MIXED CONVECTION ANALYSIS IN A LID DRIVEN
TRAPEZOIDAL CAVITY WITH ISOTHERMAL HEATING AT
BOTTOM FOR VARIOUS ASPECT ANGLES

Md. N. H. Khan Chowdhury1, Sumon Saha2 and Md. A. Hasan Mamun1
1Department of Mechanical Engineering, Bangladesh University of Engineering and Technology
(BUET), Dhaka, Bangladesh
2Department of Mechanical Engineering, The University of Melbourne, Victoria , Australia

ABSTRACT

Mixed convection heat transfer in a two-dimensional trapezoidal cavity has been investigated with a locally heated lower wall and moving cold top lid. The enclosure represents a practical system where the space requirement is very important factor for efficient electronic cooling system. The numerical study is conducted for several values of aspect angle of the cavity and a range of Richardson numbers with constant Reynolds and Prandtl numbers. The influence of Richardson number on average Nusselt number is investigated for various aspect angles. Results are represented in the form of isotherms and streamlines under different conditions. The solution procedure is conducted using the Galerkin finite element method.

Keywords: Mixed Convection, Richardson Number, Aspect Angle, Finite Element Method.

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