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首页> 外文期刊>International Journal of Heat and Mass Transfer >Modeling and simulation of liquid-liquid droplet heating in a laminar boundary layer
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Modeling and simulation of liquid-liquid droplet heating in a laminar boundary layer

机译：层状边界层中液-液液滴加热的建模与仿真

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摘要

Asymmetric liquid-liquid droplet heating mechanisms differ from the more commonly studied and better understood symmetric liquid-gas mechanisms. In this work, we simulate two-dimensional low Weber number droplet heating in developing low Reynolds number liquid boundary layers. Of particular interest are the influences of Weber, Prandtl, and Reynolds number magnitudes on the system evolution. We perform simulations with a coupled Eulerian-Lagrangian interface capturing methodology - the Lagrangian volume of fluid - alongside an Eulerian solver for the Navier-Stokes equations that provides the spatial and temporal evolution of the temperature and velocity fields for the droplet and the surrounding fluid. Our results show droplet rolling induced by the velocity boundary layer modifies the temperature field in and around the droplet. Conduction negates the thermal influence of rolling in low Prandtl number droplets, but modifies the continuous phase temperature field. The Magnus force separates the droplets from the heated surface, decreasing their heating rate. These results establish the fundamentals of asymmetric liquid-liquid droplet heating in developing boundary layers: it is necessary to include the Magnus force in physically representative near-wall droplet heating models, and resolution of near-droplet temperature gradients may be necessary in situations with temperature dependent interface processes.
机译：不对称的液-液液滴加热机理不同于更普遍研究和更好理解的对称的液-气机理。在这项工作中，我们模拟了在开发低雷诺数液体边界层时的二维低韦伯数液滴加热。韦伯，普朗特和雷诺数幅值对系统演化的影响尤其令人关注。我们使用耦合的欧拉-拉格朗日界面捕获方法-流体的拉格朗日量-以及用于Navier-Stokes方程的欧拉解算器执行仿真，该方程为液滴和周围流体提供温度和速度场的时空演化。我们的结果表明，速度边界层引起的液滴滚动改变了液滴内部和周围的温度场。传导消除了在低Prandtl数滴中滚动产生的热影响，但改变了连续相温度场。马格努斯力使液滴与受热表面分离，从而降低了其加热速率。这些结果建立了在发展的边界层中非对称液滴加热的基本原理：在物理上具有代表性的近壁液滴加热模型中必须包括马格努斯力，并且在温度变化的情况下，可能需要解决近液滴温度梯度的问题。依赖的接口过程。

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  • 作者

    E.A. Wenzel; F.A. Kulacki; S.C. Garrick;

  • 作者单位

    Department of Mechanical Engineering, 111 Church Street SE, University of Minnesota, Minneapolis, MN 55455-0111, USA;

    Department of Mechanical Engineering, 111 Church Street SE, University of Minnesota, Minneapolis, MN 55455-0111, USA;

    Department of Mechanical Engineering, 111 Church Street SE, University of Minnesota, Minneapolis, MN 55455-0111, USA;

  • 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

    Droplet heating; Multiphase; Magnus force;

    机译：液滴加热;多相马格努斯力;

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