Buoyancy driven natural convection flow in an enclosure with two discrete heating from below

摘要

Natural convection flow of air in a two-dimensional, rectangular enclosure with two discrete heating from below is studied numerically, using the stream function-vorticity formulation of the Navier-Stokes and energy equations. An implicit finite difference together with successive over relaxation (SOR) method is applied to solve the non-dimensional governing equations. Discrete heating is simulated by two heat sources on the bottom of the rectangular cavity and the different values of dimension less heat source height (H), is considered for this study. The Rayleigh number is varied from 10~3 to 10~7, based on the cavity height. The numerical results are presented in the form of streamline and isotherm as well as the physical quantities, such as, the local and average rate of heat transfer in terms of the local and average Nusselt number respectively. Businessman