铜铝微通道热沉的三维数值结构优化

在恒定泵功0.05 W条件下,对水冷铜基和铝基微通道热沉对流换热进行详细数值模拟和结构优化。通过将数值预测结果与前人已发表的试验结果进行对比,验证所使用的数值模型的正确性。同时讨论在恒定泵功下微通道几何结构对微通道热沉中温度分布的影响。模拟结果显示水冷铜基微通道热沉最优的几何结构参数为通道深为580μm,通道宽为90μm,通道密度为100个/cm;铝基微通道热沉最优的几何结构参数为通道深为620μm,通道宽为80μm,通道密度为100个/cm。

3D Numerical Geometric Optimization of Copper and Aluminum Microchannel Heat Sink

Under a constant pumping power of 0.05 W for water-cooled micro heat sinks,a semi-normalized 3-dimensional heat transfer model has been used to simulate the heat transfer performance of copper-based and aluminum-based parallel microchannel heat sinks and optimize the geometric structure of these types of micro heat sinks.The model is validated by comparing the predicted results with previously published experimental results.And the effect of the microchannel geometry on the temperature distribution in the microchannel heat sink is presented and discussed.The results turn out to be that optimal microchannel geometry is the microchannel number of 100 per centimeter,a channel width of 90 μm and a channel depth of about 580 μm for copper-based microchannel heat sinks and the microchannel number of 100 per centimeter,a channel width of 80 μm and a channel depth of about 620 μm for aluminum-based microchannel heat sinks.