Research on Heat Transfer Performance of Microchannel with Periodic Microstructures
In order to enhance the heat dissipation performance of microchannel heat sink,a microchannel with periodic microstructure is designed in this paper.The periodic microstructure is composed of needle ribs in the middle of the channel and cavities on both sides.The influence of microstructure with different structure and arrangement on the heat transfer performance of microchannels is studied by numerical simulation,and the comprehensive performance is evaluated by the enhanced heat transfer factor.The results show that among all microchannels,the microchannel with hexagonal ribs staggered and densely arranged exhibits the best thermal performance and comprehensive performance.Compared with the rectangular microchannel,when the Reynolds number is 716.8,the maximum temperature of the bottom surface decreases by about 25.46 K,the thermal resistance decreases by about 54%,the average Nusselt number increases by about 45%,and the enhanced heat transfer factor reaches 1.503.
microchannelperiodic microstructurenumerical simulationenhanced heat transfer
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