Thermal Performance Enhancement of Microchannel Heat Sinks with Sintered Porous Media

Heat-transfer enhancement of a microchannel heat sink (MCHS) with a sintered porous medium was performed numerically in detail. The three-dimensional Brinkman–Darcy–Forchheimer equations and energy equation were solved using the finite-volume method. Emphasis was placed on the effects of pumping power, geometric parameters, and properties of a porous metallic medium on the temperature distribution, pressure drop, and thermal resistance of the MCHS. The results show improved heat-transfer performance of an MCHS with a porous metallic medium compared to the performance of that without this medium. However, a significant pressure drop was induced along the channel. The results also indicate that the overall thermal resistance of the MCHS was reduced significantly when the pumping power was increased. However, the effectiveness declined considerably under high pumping power and the thermal resistance of the porous channel was not necessarily smaller than that without porous media; this suggests that if the pu...