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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical simulation of thermal property effect of heat transfer plate on bubble growth with microlayer evaporation during nucleate pool boiling
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Numerical simulation of thermal property effect of heat transfer plate on bubble growth with microlayer evaporation during nucleate pool boiling

机译：核池沸腾过程中传热板热性能对微气泡蒸发气泡生长的数值模拟

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摘要

It is well known that during nucleate boiling, a large amount of energy can be transferred under relatively small temperature difference between the heat transfer surface and fluid, indicating that high efficiency of heat transfer can be achieved. However, the mechanism of nucleate boiling is still not well elucidated owing to the complexity of the phenomenon. The thermal properties of heat transfer plate, which is directly in contact with the microlayer, may have a significant impact on heat transfer and evaporation characteristics of the microlayer. A volume of fluid (VOF) method based algorithm, in which the experimentally measured microlayer structure was taken into account, has been developed to simulate microlayer evaporation and single bubble behavior. The influence of thermal conductivity of heat transfer plates on the contribution of microlayer evaporation was examined. It was concluded that more efficient heat supply to the heat transfer surface can be achieved for the heat transfer plate with higher thermal conductivity. Microlayer evaporation occupied approximately 30-70% of the bubble volume, indicating that microlayer evaporation is a principal mechanism of boiling heat transfer.
机译：众所周知，在成核沸腾期间，在传热表面和流体之间的温度差相对较小的情况下，可以传递大量的能量，这表明可以实现高的传热效率。然而，由于该现象的复杂性，仍然没有很好地阐明成核沸腾的机理。直接与微层接触的传热板的热性能可能会对微层的传热和蒸发特性产生重大影响。已经开发了一种基于流体体积（VOF）方法的算法，其中考虑了实验测量的微层结构，以模拟微层蒸发和单气泡行为。研究了传热板的导热系数对微层蒸发贡献的影响。结论是，对于具有更高导热率的传热板，可以实现对传热表面的更有效的热供应。微层蒸发约占气泡体积的30-70％，表明微层蒸发是沸腾传热的主要机理。

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  • 作者

    Zhihao Chen; Feifei Wu; Yoshio Utaka;

  • 作者单位

    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, China,School of Mechanical Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin Haihe Education Park, Tianjin 300350, China;

    School of Mechanical Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin Haihe Education Park, Tianjin 300350, China;

    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, China,School of Mechanical Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin Haihe Education Park, Tianjin 300350, 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

    Numerical simulation; Nucleate pool boiling; Microlayer evaporation; VOF; Phase change heat transfer;

    机译：数值模拟核池沸腾;微层蒸发;VOF;相变传热;

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