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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical study of fluid flow and heat transfer in microchannel cooling passages
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Numerical study of fluid flow and heat transfer in microchannel cooling passages

机译：微通道冷却通道内流体流动和传热的数值研究

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摘要

Numerical investigation was conducted for fluid flow and heat transfer in microchannel cooling passages. Effects of viscosity and thermal conductivity variations on characteristics of fluid flow and heat transfer were taken into account in theoretical modeling. Two-dimensional simulation was performed for low Reynolds number flow of liquid water in a 100 μm single channel subjected to localized heat flux boundary conditions. The velocity field was highly coupled with temperature distribution and distorted through the variations of viscosity and thermal conductivity. The induced cross-flow velocity had a marked contribution to the convection. The heat transfer enhancement due to viscosity-variation was pronounced, though the axial conduction introduced by thermal-conductivity-variation was insignificant unless for the cases with very low Reynolds numbers.
机译：对微通道冷却通道中的流体流动和传热进行了数值研究。理论建模中考虑了粘度和导热系数变化对流体流动和传热特性的影响。在局部热通量边界条件下，对100μm单通道中液态水的低雷诺数流动进行了二维模拟。速度场与温度分布高度相关，并且由于粘度和导热率的变化而扭曲。引起的横流速度对流有显着贡献。尽管由于雷诺数非常低的情况，由热传导率变化引入的轴向传导是微不足道的，但是由于粘度变化引起的传热增强是明显的。

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