Key words: Numerical method, Entropy generation, porous media, mixed convection.

Abstract: The numerical analysis of two-dimensional laminar mixed convection flow through a channel filled with saturated porous media under thermal gradient is investigated. The Darcy-Brinkman model is employed. The conservation equations are solved using a Control Volume Finite Element Method. Total entropy generation is investigated at global and local levels by varying the porosity from 1 to 0.2 at fixed values of Ra= 10⁴, Re =10, Br*=10^-3. Results show the existence of dissipative structures.