Modeling of Rectangular Microchannel Heat Sink with Non-Uniform Channels and Multi-Objective Optimization  

作　　者：SHANG Xueshuo WANG Yixin LI Qingwen WANG Rui CUI Zheng SHAO Wei 

机构地区：[1]Institute of Advanced Technology,Shandong University,Ji'nan 250014,China [2]Institute of Thermal Science and Technology,Shandong University,Ji'nan 250014,China [3]Shandong Institute of Advanced Technology,Ji'nan 250100,China

出　　处：《Journal of Thermal Science》2024年第5期1701-1711,共11页热科学学报（英文版）

基　　金：supported by Natural Science Foundation of Shandong Province(No.ZR2021QE033);China Postdoctoral Science Foundation(No.2021M702013);the Taishan Scholar Project(Grand No.tsqn202103142)。

摘　　要：Rectangular microchannel heat sinks(MCHS)are widely used to cool high-heat-flux electronic devices.However,previous studies focused mainly on MCHS with uniform channels(UCs).This study considers a microchannel heat sink with non-uniform channels(NUCs).A mathematical model is developed based on energy equations and the Darcy flow principle.Explicit expressions for total thermal resistance and coolant pressure drop are derived using the thermoelectric analogy.Experiments and numerical simulations are performed to verify the mathematical model.As non-uniformity increases,total coolant pressure drop decreases but at the cost of higher thermal resistance.The overall performance of NUCs is better than that of UCs because of their lower ratio of pumping power to cooling power.Heat transfer performance of NUCs changes little for more than 120 channels and depends mainly on channel arrangement.A multi-objective optimization is conducted to minimize the thermal resistance and pumping power of an NUC.An optimal NUC saves 64%pumping power compared with a conventional UC for the total thermal resistance of 0.1℃/W,indicating that the use of non-uniform channels could be very helpful to reduce the flow resistance of MCHS.

关 键 词：microchannel heat sink non-uniform channel mathematical model multi-objective optimization 

分 类 号：TN03[电子电信—物理电子学] TK124[动力工程及工程热物理—工程热物理]