| 微重力下凝结和沸腾着的汽泡周围流场 |
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| 引用本文： | ChristopherD．M．,彭晓峰,王补宣.微重力下凝结和沸腾着的汽泡周围流场[J].工程热物理学报,1997(6). |
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| 作者姓名： | ChristopherD．M． 彭晓峰 王补宣 |
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| 作者单位： | 清华大学热能工程系!北京，100084，清华大学热能工程系!北京，100084，清华大学热能工程系!北京，100084 |
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| 基金项目： | 国家自然科学基金，国家教委优秀年轻教师基金 |
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| 摘 要： | 1引言尽管对沸腾换热已有大量的研究，但对沸腾过程中驱动汽泡外流动的机理仍没有透彻理解，通常认为，汽泡外流动是由液体自然对流引起的。但是，近来的微重力实验表明［‘］；在没有自然对流的微重力场中，沸腾换热同样很剧烈。为了弄清正常重力和微重力环境中驱动换热的机理，很有必要作进一步的研究。本文数值分析了微重力环境下驱动壁面汽泡周围液体流动的基本机理，深入分析了Marangoni效应的影响，同时考虑表面凝结和蒸发过程的作用。2理论模型汽泡外流动可由二维层流N－S方程及烙方程来描述，流动是由Marangoni边界条件驱动，该条…
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| 关 键 词： | Marangoni流 微动 沸腾 |
FLOW FIELD AROUND A CONDENSING AND EVAPORATING VAPOR BUBBLE IN MICROGRAVITY |
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| Christopher D. M. Peng Xiaofeng Wang Buxuan.FLOW FIELD AROUND A CONDENSING AND EVAPORATING VAPOR BUBBLE IN MICROGRAVITY[J].Journal of Engineering Thermophysics,1997(6). |
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| Authors: | Christopher D M Peng Xiaofeng Wang Buxuan |
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| Abstract: | The heat transfer in the liquid region surrollnding a vapor bubble during boiling in microgravity is investigated numerically. The liquid region includes a microlayer below the bubble. The flow is driven by Marangoni fiow. The model also includes condensation and evaporation at the bubble surface. The results show that the velocities are small and that the temperature distribution is not significantly different from the solution for pure conduction in the liquid. Depending on the conditions, Marangoni flow and natural convection both increase the heat transfer by about 2O% compared to conduction. |
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| Keywords: | marangoni flow microgravity boiling |
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