Novel converging–diverging microchannel heat sink with porous fins for combined thermo-hydraulic performance

The optimum design of the microchannel heat sinks needs to consider both transfer and pressure drop limitations microchannel. In this paper, a novel configuration sink is proposed obtain improved thermo-hydraulic performance. includes porous fins that form adjacent converging–diverging channels. Three-dimensional steady laminar simulations were conducted access performance compare it with conventional parallel ones solid fins. results showed by using design, 9.75% decrease in observed when compared fin Also, mean Nusselt number maximum improvement 16.5% overall evaluation factor also significant 20% designs. analysis flow fields leads local difference between two neighboring channels inducing cross-wise velocity component within leading enhanced thermal Moreover, was shown only for angles above 0.5 [Formula: see text], enhancement showing existence an range angles. response surface method used find porosity angle where maximum.