SIMULATION OF LAMINAR MIXED CONVECTION RECESS FLOW COMBINED WITH RADIATION HEAT TRANSFER

Abstract

In the current work, two-dimensional simulations are presented for incompressiblelaminar mixed convection flow of a radiating gas over a recess including two backward andforward facing steps in a vertical duct. The continuity, momentum and energy equations for fluidflow are solved by the computational fluid dynamic (CFD) techniques. The fluid is treated as agray, absorbing, emitting and scattering medium. For computation of the radiative term in theenergy equation, the radiative transfer equation (RTE) is solved numerically by the discreteordinates method (DOM). The effects of Grashof number, radiation-conduction parameter andoptical thickness on heat transfer behavior of the system are studied.