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首页> 外文期刊>Journal of Heat Transfer >A Thermocapillary Mechanism for Lateral Motion of Bubbles on a Heated Surface During Subcooled Nucleate Boiling
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A Thermocapillary Mechanism for Lateral Motion of Bubbles on a Heated Surface During Subcooled Nucleate Boiling

机译：在过冷核沸腾过程中气泡在受热表面上横向运动的热毛细管机制

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摘要

Both thermocapillary flow and the concerted motion of bubbles toward each other in subcooled nucleate boiling have been mentioned in the. literature on boiling phenomena, but never associated with each other. Also, it has been shown in previously unrelated contributions that thermocapillary flow around bubbles of sparingly soluble gas can cause those bubbles to aggregate on a warm surface. The conjunction of these observations leads to the hypothesis that mutual entrainment in thermocapillary flow might drive bubbles toward each other during nucleate boiling of a sub-cooled liquid. An approximate equation for estimating the observability of such motion is presented. The effect would be especially important in cases where the bubble release rate is low such as boiling on horizontal down-facing surfaces and boiling in micro-gravity.
机译：在过冷的核沸腾中，已经提到了热毛细流和气泡向彼此的一致运动。关于沸腾现象的文献，但从未相互联系。同样，在先前无关的贡献中已经表明，微溶性气体气泡周围的热毛细流动会导致这些气泡聚集在温暖的表面上。这些观察结果的结合导致了这样一个假说：在过冷液体的成核沸腾过程中，热毛细流中的相互夹带可能将气泡相互逼近。提出了用于估计这种运动的可观察性的近似方程。在气泡释放率较低的情况下，例如在水平朝下的表面上沸腾并且在微重力下沸腾，这种效果将尤其重要。

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  • 来源
    《Journal of Heat Transfer》 |2002年第6期|p.1203-1207|共5页
  • 作者

    Paul J. Sides;

  • 作者单位

    Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213;

  • 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 热力工程、热机;
  • 关键词

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