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Effect of aspect ratio on saturated boiling flow in microchannels with nonuniform heat flux

机译：长径比对热流不均匀的微通道饱和沸腾流动的影响

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摘要

MicroChannel two-phase flow is an effective cooling method used in microelectronics, in which the heat flux density is unevenly distributed usually. The paper is focused on numerical study the effect of aspect ratio on the flow boiling of microchannels with nonuniform heat flux. The heat source is a three-dimensional (3D) integrated circuit. 3D microchannel model and volume of fluid method are coupled in numerical simulation. The results show that the aspect ratio has no relationship with the two-phase pressure drop of the micro-channel. It has a certain influence on the distribution of bubble shape. In terms of the heat transfer coefficient, the aspect ratio has a certain influence on a section of the inlet. Due to the nucleate boiling, the convective heat transfer in the remaining areas is the dominant factor and the average heat transfer coefficient is mainly determined by the heat flux at the bottom of the channel.
机译：微通道两相流是微电子学中一种有效的冷却方法，其中热通量密度通常分布不均。本文着重于数值研究长径比对热通量不均匀的微通道流动沸腾的影响。热源是三维（3D）集成电路。在数值模拟中耦合了3D微通道模型和流体体积方法。结果表明，纵横比与微通道的两相压降无关。它对气泡形状的分布有一定影响。就传热系数而言，长宽比对入口的截面有一定影响。由于核沸腾，其余区域的对流传热是主要因素，平均传热系数主要由通道底部的热通量决定。

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  • 来源
    《Heat transfer》 |2019年第7期|3312-3327|共16页
  • 作者

    Wen-Tao Yan; Wei-Biao Ye; Cong Li;

  • 作者单位

    Department of Process Equipment and Control Engineering School of Mechanical Engineering Xiangtan University Xiangtan People's Republic of China;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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