Double-Layer Metal Foams for Further Heat Transfer Enhancement in a Channel: An Analytical Study

A local thermal non-equilibrium analysis of heat and fluid flow in a channel fully filled with aluminum foam is performed for three cases: (a) pore density 5 PPI (pore per inch), (b) 40 PPI, (c) two different layers PPI. The dimensionless forms developed equations the phase conduction equation solid are solved analytically. effects interfacial transfer coefficient dispersion conductivity considered. Analytical expressions temperature profile phases, also Nusselt number (NuH) obtained. obtained results discussed terms channel-based Reynolds (ReH) changing from 10 to 2000, thickness ratio between height sublayers. always greater than that channel. It two-layer foams until specific then becomes uniform channels due higher velocity outer region considerable increase dispersion.