• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physics of fluids >Combined direct numerical simulation and long-wave simulation of a liquid film sheared by a turbulent gas flow in a channel
【24h】

Combined direct numerical simulation and long-wave simulation of a liquid film sheared by a turbulent gas flow in a channel

机译：通过通道中湍流气流剪切的液体膜的结合直接数值模拟和长波模拟

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

In this work, the dynamics of a thin liquid film sheared by a turbulent gas flow are investigated numerically. It is known that even a constant interfacial shear stress affects film stability and dynamics. We are interested in the effect of turbulent fluctuations on the film development. A combination of a direct numerical simulation (DNS) of the turbulent gas flow and a long-wave theory for the liquid film evolution is used to study the effect of the turbulent shear stress fluctuations on the liquid film. The simulation is carried out in two steps. First, a DNS of a single-phase turbulent channel flow is conducted. The time-dependent turbulent shear stress at the lower wall is stored. In the second step, the time- and location-dependent turbulent shear stress serves as a boundary condition in a one-sided long-wave simulation of the liquid film to identify the effect of the turbulent gas flow on the film stability and dynamics. The resulting film deformation is simulated for different Reynolds numbers, and an analysis of the film deformation and stability as a function of the turbulent shear stress fluctuations is given. The numerical simulations are accompanied by a simplified linear analysis. The results show that the dynamics of the liquid film sheared by a turbulent gas flow depend not only on the average shear stress at the liquid-gas interface but also on the amplitude as well as the temporal and spatial scales of the shear stress fluctuations. Published under license by AIP Publishing.
机译：在这项工作中，由一个湍流气体流剪切的薄液体膜的动力学数值研究。已知的是，即使界面剪切应力恒定影响薄膜的稳定性和动态特性。我们感兴趣的是动荡的波动对电影发展的影响。湍流气体流和长波理论用于液体膜进化的直接数值模拟（DNS）的组合被用来研究紊流剪切应力波动对液体薄膜的效果。模拟分两个步骤进行。首先，将单相槽道湍流的DNS进行的。在下部壁依赖于时间的湍流的剪切应力被存储。在第二个步骤中，将时间和位置相关的湍流的剪切应力作为在一个边界条件片面液膜的长波仿真，以确定在薄膜稳定性和动态湍流气体流的作用。所得到的膜的变形进行了模拟对不同雷诺数，并且被赋予膜变形和稳定作为紊流剪切应力波动的函数的分析。数值模拟都伴随着一个简化的线性分析。结果表明，通过湍流气体流剪切将液体膜的动力学不仅取决于在液 - 气界面的平均剪切应力，而且所述振幅以及剪切应力波动的时间和空间尺度。通过AIP发布在许可证下发布。

著录项

  • 来源
    《Physics of fluids》 |2019年第2期|共14页
  • 作者

    Bender Achim; Stroh Alexander; Frohnapfel Bettina; Stephan Peter; Gambaryan-Roisman Tatiana;

  • 作者单位

    Tech Univ Darmstadt Inst Tech Thermodynam Alarich Weiss Str 10 D-64287 Darmstadt Germany;

    Karlsruhe Inst Technol Inst Fluid Mech Kaiserstr 10 D-76131 Karlsruhe Germany;

    Karlsruhe Inst Technol Inst Fluid Mech Kaiserstr 10 D-76131 Karlsruhe Germany;

    Tech Univ Darmstadt Inst Tech Thermodynam Alarich Weiss Str 10 D-64287 Darmstadt Germany;

    Tech Univ Darmstadt Inst Tech Thermodynam Alarich Weiss Str 10 D-64287 Darmstadt Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 流体力学;
  • 关键词

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