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首页> 外文期刊>Journal of Heat Transfer >Experimental Study on the Effect of Low Acute Side Angles on Heat Transfer in Rhombic Shaped MicroChannel
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Experimental Study on the Effect of Low Acute Side Angles on Heat Transfer in Rhombic Shaped MicroChannel

机译：低锐角对菱形微通道传热影响的实验研究

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摘要

This experimental study on rhombic shaped microchannels was conducted to understand the effect of a low acute side angle on the Nusselt number and compare the results with the published numerical results for H1 (axially constant heat flux and circumferentially constant temperature) and H2 (constant axial and circumferential wall heat flux) boundary conditions. The hydraulic and heat transfer characteristics of the rhombic geometry with a side angle of 30 deg for different mass flow rates and heat flux inputs are obtained using a three-dimensional (3D) conjugate heat transfer model, which is validated with the experimental results. It is found that the average Nusselt number obtained from the experimental and numerical results can be approximated closely with that computed using the H1 boundary condition. The local Nusselt number of hydrodynamically and thermally developed regions obtained from the numerical analysis is compared with a correlation for the H1 boundary condition. These results will be useful in design and optimization of a rhombic shaped microchannel for electronic cooling applications.
机译：进行了菱形微通道的实验研究，以了解低锐角对Nusselt数的影响，并将结果与​​H1（轴向恒定的热通量和周向恒定的温度）和H2（恒定的轴向和轴向温度）的已公布数值结果进行比较。圆周壁热通量）边界条件。使用三维（3D）共轭传热模型获得了具有不同质量流量和热通量输入的，边角为30°的菱形几何形状的水力和传热特性，并通过实验结果进行了验证。发现从实验和数值结果获得的平均努塞尔数可以与使用H1边界条件计算得到的数值近似地近似。将通过数值分析获得的水动力和热力开发区域的局部Nusselt数与H1边界条件的相关性进行比较。这些结果将有助于设计和优化用于电子冷却应用的菱形微通道。

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