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A parametric study on thermal performance of microchannel heat sinks with internally vertical bifurcations in laminar liquid flow

机译:在层流中具有内部垂直分叉的微通道散热器热性能的参数研究

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摘要

The optimal position of internal vertical bifurcation integrated with a microchannel heat sink (MHS) is investigated numerically in the present research. The corresponding rectangular smooth microchannel is compared with those with internal vertical bifurcation. The optimal position along the streamwise direction for interval distances is studied in detail. The corresponding temperature fields, flow fields, pressure drop and thermal characteristics are presented through verified computational model. The numerical simulation indicates that a clear inflection point of pressure gradient may prevail with the presence of internal vertical bifurcation. It is also found that the microchannel heat sink with a small distance between the tail end of internal vertical bifurcation and the outlet of microchannel shows the best thermal performance instead of those with setting the tail end of internal bifurcation at the outlet of microchannel. The proposed optimal design of internal vertical bifurcation shows improved thermal performance without any pressure drop penalty.
机译:在本研究中数值研究了内部垂直分叉与微通道散热器(MHS)集成的最佳位置。将相应的矩形平滑微通道与内部垂直分叉的矩形微通道进行比较。详细研究了间隔距离沿流向的最佳位置。通过验证的计算模型给出了相应的温度场,流场,压降和热特性。数值模拟表明,在内部垂直分叉的情况下,可能会出现明显的压力梯度拐点。还发现,内部竖直分叉的尾端与微通道出口之间的距离较小的微通道散热器具有最佳的热性能,而不是将内部分叉的尾端设置在微通道的出口处的散热器。所建议的内部垂直分叉的最佳设计显示出改善的热性能,而没有任何压降损失。

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  • 作者单位

    Department of Mechanical and Power Engineering, School of Marine Science and Technology, Northwestern Polytechnical University, P.O. Box 24, Xi'an 710072, China,School of Mechanical Engineering, Northwestern Polytechnical University, P.O. Box 552, Xi'an 710072, China;

    Department of Mechanical Engineering, National Chiao Tung University, EE474, 1001 University Road, Hsinchu 300, Taiwan, ROC;

    Department of Mechanical and Power Engineering, School of Marine Science and Technology, Northwestern Polytechnical University, P.O. Box 24, Xi'an 710072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    MicroChannel heat sink; Vertical bifurcation; Thermal resistance; Pressure drop; Optimal position;

    机译:微通道散热器;垂直分叉;热阻;压力下降;最佳位置;

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