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环形浅液池内低Prandtl数流体超临界热毛细对流演化

张利 李友荣 刘丽娜 吴春梅

张利, 李友荣, 刘丽娜, 吴春梅. 环形浅液池内低Prandtl数流体超临界热毛细对流演化[J]. 空间科学学报, 2018, 38(3): 373-379. doi: 10.11728/cjss2018.03.373
引用本文: 张利, 李友荣, 刘丽娜, 吴春梅. 环形浅液池内低Prandtl数流体超临界热毛细对流演化[J]. 空间科学学报, 2018, 38(3): 373-379. doi: 10.11728/cjss2018.03.373
ZHANG Li, LI Yourong, LIU Lina, WU Chunmei. Transition Process of Supercritical Thermocapillary Convection in a Shallow Annular Pool for Low Prandtl Number Fluids[J]. Journal of Space Science, 2018, 38(3): 373-379. doi: 10.11728/cjss2018.03.373
Citation: ZHANG Li, LI Yourong, LIU Lina, WU Chunmei. Transition Process of Supercritical Thermocapillary Convection in a Shallow Annular Pool for Low Prandtl Number Fluids[J]. Journal of Space Science, 2018, 38(3): 373-379. doi: 10.11728/cjss2018.03.373

环形浅液池内低Prandtl数流体超临界热毛细对流演化

doi: 10.11728/cjss2018.03.373
基金项目: 

国家自然科学基金项目(11532015)资助

详细信息
    作者简介:

    李友荣,E-mail:liyourong@cqu.edu.cn

  • 中图分类号: V524

Transition Process of Supercritical Thermocapillary Convection in a Shallow Annular Pool for Low Prandtl Number Fluids

  • 摘要: 为研究低Prandtl数(Pr)流体热毛细对流演化过程,对环形浅液池内Pr=0.011的流体热毛细对流进行三维数值模拟.研究发现:当Marangoni数较小时,流动为轴对称稳态流动;当Marangoni数超过某一临界值后,流动失稳并转变为热流体波,其波数随Marangoni数增加而减小,而波动主频增大;随着Marangoni数增加,流动加强,沿周向运动的热流体波演变为沿径向运动的径向波,其波数大大减小;当Marangoni数继续增加时,波动频谱曲线噪声增加,呈广谱特性.因此,在计算范围内热毛细对流的演化过程为:轴对称稳态流动-热流体波-单周期径向波-多周期三维振荡流动.

     

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出版历程
  • 收稿日期:  2017-08-22
  • 修回日期:  2018-01-24
  • 刊出日期:  2018-05-15

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