凹槽微通道铜水纳米流体传热与流动分析

摘要

对铜水纳米流体在圆弧型凹槽微通道中的传热与流动特性进行了分析。比较了不同体积分数的铜水纳米流体在深宽比分别为0·3和0·5的凹槽微通道中的温度和速度分布，分析了体积分数和凹槽深宽比对凹槽微通道中铜水纳米流体的传热系数和流体输运动力因子的影响。凹槽强化了微通道对流传热，与平板型微通道相比，铜水纳米流体在圆弧型凹槽微通通内呈现出不同的传热特性。纳米流体体积分数、流体输运动力因子和凹槽深宽比对凹槽强化微通道传热影响较大。分析结果与已有的实验结果符合较好。%This paper analyzed the fluid flow and heat transfer of Cu-water nanofluids in grooved microchanel.The velocity and temperature distribution of Cu-water nanofluids in grooved-microchan-nels with depth to width ratio of 0·3 and 0·5 were conducted.Besides,the heat transfer coefficients of Cu-water nanofluids and the fluid transport power factor in the arc-grooved microchannels were also investigated.The grooves strengthen convective heat transfer in the microchannels.Compared with the plate microchannels,the heat transfer of Cu-water nanofluids in arc-grooved microchannels displays different characteristics.Nanofluid concentration,fluid transport power factor and the depth to width ratio influence the heat transfer in the grooved microchannels greatly.The results herein accord with experimental data.