• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Thermocapillary flow transition in an evaporating liquid layer in a heated cylindrical cell
【24h】

Thermocapillary flow transition in an evaporating liquid layer in a heated cylindrical cell

机译：在加热圆柱形电池中的蒸发液层中的热量流量过渡

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Motived by recent ground-based and microgravity experiments investigating the interfacial dynamics of a volatile liquid (FC-72, Pr = 12.34) contained in a heated cylindrical cell, we numerically study the thermocapillary-driven flow in such an evaporating liquid layer. Particular attention is given to the prediction of the transition of the axisymmetric flow to fully three-dimensional patterns when the applied temperature increases. The numerical simulations rely on an improved one-sided model of evaporation by including heat and mass transfer through the gas phase via the heat transfer Biot number and the evaporative Biot number. We present the axisymmetric flow characteristics, show the variation of the transition points with these Biot numbers, and more importantly elucidate the twofold role of the latent heat of evaporation in the stability; evaporation not only destabilizes the flow but also stabilizes it, depending upon the place where the evaporation-induced thermal gradients come into play. We also show that buoyancy in the liquid layer has a stabilizing effect, though its effect is insignificant. At high Marangoni numbers, the numerical simulations revealed smaller-scale thermal patterns formed on the surface of a thinner evaporating layer, in qualitative agreement with experimental observations. The present work helps to gain a better understanding of the role of a phase change in the thermocapillary instability of an evaporating liquid layer.
机译：通过最近的基于基于和微匍匐的实验的动态研究加热圆柱形电池中含有的挥发性液体（FC-72，PR = 12.34）的界面动力学，我们在这种蒸发液层中进行了数值研究热缺陷的流动。当施加的温度升高时，特别注意在施加温度增加时预测轴对称流动到完全三维图案的转变。数值模拟依赖于通过通过传热Biot数和蒸发生物编号通过气相的热量和质量传递改进的蒸发的单面模型。我们介绍了轴对称流动特性，显示了具有这些生物数据的过渡点的变化，更重要的是在稳定性中阐明蒸发潜热的双重作用;蒸发不仅破坏了流量，而且取决于蒸发引起的热梯度进入游戏的地方，也稳定了它。我们还表明，液体层中的浮力具有稳定效果，尽管其效果是微不足道的。在高Marangoni号码中，数值模拟揭示了在与实验观察的定性协议中较薄的蒸发层表面上形成的较小规模的热图案。本作者有助于更好地理解相变在蒸发液体层的热量缺乏性中的相变的作用。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第6期|119587.1-119587.10|共10页
  • 作者

    Wenjun Liu; Paul G. Chen; Jalil Ouazzani; Qiusheng Liu;

  • 作者单位

    Institute of Mechanics Chinese Academy of Sciences Beijing China Aix Marseille University CNRS Centrale Marseille M2P2 Marseille France School of Engineering Science University of Chinese Academy of Sciences Beijing China;

    Aix Marseille University CNRS Centrale Marseille M2P2 Marseille France;

    Arcofluid Consulting LLC 309 N Orange Ave Orlando FL 32801 USA Guilin University of Electronic Technology Guilin China;

    Institute of Mechanics Chinese Academy of Sciences Beijing China School of Engineering Science University of Chinese Academy of Sciences Beijing 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

    Thermocapillary convection; Flow transition; Evaporation; Numerical simulation;

    机译：热毛细管对流;流动过渡;蒸发;数值模拟;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号