Effect of Reverting Channels on Heat Transfer Performance of Microchannels with Different Geometries

Abstract

This study investigated the effect of reverting microchannels inside a heat sink on increase of cooling rate as well as the effect of their different configurations on maximum temperature and pressure drop. Based on the convection heat transfer mechanism, selection of the embedded microchannels' configurations including circular, square and triangular ones, was studied for geometric optimization of the discussed heat sinks. The goal was to minimize the thermal resistance through optimizing the geometries. The volume ratio  was defined as the ratio of the volume taken up by microchannels to the solid volume (portion of the heat sink not occupied by microchannels) and was considered as 0.05. According to the results, in addition to obtaining a more uniform temperature distribution, reverting channels remarkably reduced the maximum temperature. Moreover, the heat sink with square shape showed less thermal resistance as compared to the other two geometries.

Constructal studies on hexagonal microchannel heat sinks based on multi-physics field coupling calculations

“…将工质的供液通道与回液通道集成在热沉 上, 更有利于电子器件布置的紧凑化, 成为一种新的 热沉设计结构型式. Ghaedamini等人 [19] 通过数值方法 对工质回流式微通道圆盘热沉进行构形设计, Farza-neh等人 [20,21] 对工质回流式微通道正方形、正三角形 热沉及微通道构造方式进行了构形设计. 多学科构形优化适应多学科工程最优化的实际需 求, 是构形理论发展的趋势.…”