In the present study, thermohydraulic characteristics of heat sinks with short micro pin fin (height of fin shorter than the total height of heat sink) of different shapes (square and elliptical) and different arrangements (interrupted and staggered) are studied, considering deionized water as the coolant. Experiments are conducted on silicon heat sink fabricated using wet etching. The pressure drop and temperature at different locations of micro pin fin heat sink are measured in the experiments. A numerical model is developed and validated with the experimental results with suitable boundary conditions. The numerical and experimental results show temperature variations in the inlet and outlet collectors of the micro pin fin heat sink due to conjugate heat transfer effects. The thermal resistance of three different arrangements is compared. It is found that the shape of the pin fin has a considerable effect on the thermal resistance as compared to the arrangement of a short pin fin in the micro heat sink.

中文翻译：

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不同形状和排列的短销翅片对微热沉热阻的影响

在本研究中，研究了考虑去离子水的，具有不同形状（正方形和椭圆形）和不同布置（间断和交错）的短微针翅片（翅片的高度短于散热器的总高度）的散热器的热工水力特性。作为冷却剂。在使用湿法刻蚀制造的硅散热器上进行了实验。实验中测量了微针翅片散热器不同位置的压降和温度。建立了数值模型，并在适当的边界条件下用实验结果进行了验证。数值和实验结果表明，由于共轭传热效应，微针翅片散热器的入口和出口集热器中的温度变化。比较了三种不同布置的热阻。