DEPENDENCE OF BUOYANCY-DRIVEN FLOW INSIDE AN OBLIQUE POROUS CAVITY ON ITS ORIENTATION

In the present paper attention is focused to clarify how orientation of an oblique porous cavity may affect the establishment of buoyancy-driven flow therein. Two opposite walls of the cavity are kept at constant but different temperatures while the other two are maintained adiabatic. The mass, momentum, and energy conservation equations are solved numerically adopting a controlvolume based computational procedure. The generation of entropy is also discussed taking into account both heat transfer irreversibility and fluid friction irreversibility. The developed numerical model is validated against previously published works. Thereafter, simulation results are presented for the inclination angles of π/4, 3π/4, 5π/4, and 7π/4 and the corresponding results are compared. It is demonstrated that, among current cases, the optimum case with respect to heat transfer as well as entropy generation is achieved through the orientations with the hot wall in the top and the cold wall in the bottom.