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首页> 外文期刊>International Journal of Heat and Mass Transfer >Constructal cooling channels for micro-channel heat sinks
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Constructal cooling channels for micro-channel heat sinks

机译：用于微通道散热器的结构性冷却通道

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摘要

This paper documents the geometric optimisation of a three-dimensional micro-channel heat sink. The objective is to minimise the peak temperature from the walls to the coolant fluid. The optimisation is performed numerically by using the finite volume method. The numerical simulation was carried out on a unit cell with volume ranging from 0.1 mm~3 to 0.9mm~3 and pressure drop between 10 kPa and 75 kPa. The axial length of the micro-channel heat sink was fixed at 10 mm. The cross-sectional area of the micro-channel heat sink is free to morph with respect to the degree of freedoms provided by the aspect ratio and the solid volume fraction. The effect of the total solid volume fraction and the pressure drop on the aspect ratio, channel hydraulic diameter and peak temperature is investigated. The numerical results show that the degrees of freedom have a strong effect on the peak temperature and the maximum thermal conductance. The optimal geometric characteristics obtained numerically (the aspect ratio and the optimal channel shape (hydraulic diameter)) are reported and compared with those obtained from approximate relationships using scale analysis. The predicted trends are found to be in good agreement with the numerical results.
机译：本文介绍了三维微通道散热器的几何优化。目的是最小化从壁到冷却液的峰值温度。通过使用有限体积法以数值方式进行优化。对体积在0.1mm〜3至0.9mm〜3之间，压降在10 kPa至75 kPa之间的晶胞进行了数值模拟。微通道散热器的轴向长度固定为10毫米。相对于由纵横比和固体体积分数提供的自由度，微通道散热器的横截面积是自由变形的。研究了总固体体积分数和压降对长宽比，通道水力直径和峰值温度的影响。数值结果表明，自由度对峰值温度和最大热导率有很大影响。报告通过数值获得的最佳几何特征（纵横比和最佳通道形状（液压直径）），并将其与使用比例分析从近似关系中获得的几何特征进行比较。发现预测趋势与数值结果非常吻合。

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