Fully developed mixed convection in vertical double passage porous annuli

Abstract

In the present analysis, fully developed mixed convection in the vertical double-passage annuli filled with porous media is investigated both analytically and numerically by imposing asymmetric thermal conditions. Three vertical concentric cylinders are used to form double passage annuli of which thin and conductive middle cylinder is considered know as baffle. Using finite difference technique, the governing equations are solved numerically by considering viscous dissipation, whereas the closed form solution are obtained by neglecting viscous dissipation. Numerical solution matches with that of closed form solution in the absence of viscous dissipation. The results reveal that modified Grashof number, Brinkmann number, Darcy number, position of baffle has profound impacts on velocity profiles, temperature profiles and on heat transfer rate.