Study on performance of microchannel heat sinks with different cavity and rib combinations
The microchannel heat sink is an effective component for heat dissipation in microelectronic systems.In order to improve the thermal performance of the microchannel heat sink,a novel combined microchannel design featuring various cavity shapes and straight ribs is proposed in this paper,and its heat transfer and flow performance are studied by numerical simulation.The study combines a trapezoidal cavity with four types of straight ribs:rectangular,rectangular rounded,front airfoil and rear airfoil.Additionally,the top length of the cavity is changed on the basis of rectangular rounded straight ribs.The effects of different Reynolds number(Re)on Nusselt number,friction coefficient and thermal enhancement efficiency are analyzed respectively.The results indicate that the combination of cavity and rib can greatly improve the performance of the heat sink;Among the tested models,the triangular cavity with rectangular rounded rib model exhibites the best comprehensive thermal performance across various Re values,achieving the highest thermal enhancement efficiency at Re=400,with a 19.3%improvement in overall performance compared to the initial trapezoidal cavity with rib model.
microchannel heat sinkcavity and rib combinationcomprehensive thermal performancenumerical simulation
万方数据
维普
