Effect of Microrib Distribution on Heat Transfer Performance of Rectangular Microchannel Radiator
Taking the rectangular microchannel heat sink as the research object,the effects of three microrib distribution modes(parallel distribution,parallel-sidewall distribution and staggered distribution)on the heat transfer performance of the rectangular microchannel heat sink were studied by numerical simulation technology.The simulation results show that when the inlet velocity is 0.2 m/s,the vortex strength in the cross-dis-tributed channel is the highest.The pressure difference at the entrance and exit of the three channels is ΔP1=47.81 Pa,ΔP2=60.11 Pa,ΔP3=57.50 Pa,and the channel with parallel side-wall distribution increases the fluid flow resistance due to the addition of micro-ribs on the side wall,and the pressure difference at the entrance and exit is the lar-gest.The flow resistance of the interlaced fluid increases due to the action of microfins,and the channel pressure difference is larger than that of parallel distribution.The average temperature of the bottom surface of the microchannel with staggered distribution of constant heat flow is 306.97 K,the temperature of the solid area up the bottom surface gradually decreases,and the average temperature of the top surface is 296.37 K.The tem-perature of the microribs at the same position in the channel is lower than that of type Ⅰ and type Ⅱ,which indicates that the staggered distribution of microribs has the greatest influence on the heat transfer performance of the rectangular microchannel heat sink.
heat sinkrectangular microchannelenhanced heat transfermicrofin distribution mode
万方数据
维普
