The method of modeling fluid flow over porous blocks utilizes heat transfer and fluid flow equations and a discretization numerical method to model heat transfer rates in a square cavity containing a pair of porous blocks. Fluid flow and heat transfer are modeled within a square cavity having an inlet and an outlet formed therethrough. The inlet and outlet are positioned opposite one another along a diagonal of the square cavity. A laminar airflow is introduced at the cavity inlet while a constant heat flux is maintained in the pair of porous blocks.