Fully Developed Magnetoconvective Heat Transfer in Vertical Double-Passage Porous Annuli

Abstract

This study examines the combined analytical and numerical investigations of fully developed mixed convective flow in vertical double-passage porous annuli formed by three vertical concentric cylinders. Also, the effects of viscous dissipation and magnetic field are considered. The governing fully developed equations are analytically solved in the absence of viscous dissipation, while an implicit finite difference technique has been applied to solve the governing equations when the viscous dissipation effects are taken into consideration. Detailed and systematic numerical simulations are carried out to explore the effects of porosity, magnetic field, viscous dissipation, modified Grashof number, baffle position and radius ratio on the flow pattern, temperature distribution and heat transfer rate and are discussed through the graphs. The numerical results reveal that the presence of viscous dissipation has profound influence of thermal distribution, whereas the velocity profiles are significantly altered by the Darcy and Hartmann numbers.