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Turbulent liquid film evaporation in a partially heated wall along a vertical tube

机译：沿垂直管的部分加热壁中的湍流液体膜蒸发

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摘要

In this numerical study, the evaporative heat and mass transfer of a turbulent falling liquid film in a finite vertical tube are investigated. The liquid film flows in the tube's inner wall, whose outer wall is partially subject to thermal flux. Here, different configurations corresponding to thermal flux imposed on different external surface wall percentages are examined. External face zones where the heat flux is not applied are maintained insulated. The nonlinear set of parabolic mass, momentum, energy, and mass fraction conservation equations combined with boundary and interfacial conditions are treated numerically using implicit finite difference procedure. For falling liquid film analysis, an adapted Van Driest turbulence model is used. For the present work, it is supposed that gas flows in a laminar regime. We examine in this paper the impact of the percentage of heated surface area on flows as well as on heat and mass transfer. Obtained results for a partially heated wall are compared with those produced for an entirely heated wall.
机译：在该数值研究中，研究了有限垂直管中湍流落液膜的蒸发热量和传质。液体膜在管的内壁中流动，其外壁部分地受到热通量。这里，检查对应于施加在不同外表面壁百分比上的热通量的不同配置。不施加热通量的外表面区域保持绝缘。使用隐式有限差分程序在数值上与边界和界面条件相结合的抛物线质量，动量，能量和质量分数保护方程的非线性集合。对于液体薄膜分析下降，使用适应的VAIT DRIEST湍流模型。对于目前的工作，它应该在层流制度中流动。我们在本文中检查了加热的表面积百分比对流动的影响以及热量和传质。将部分加热壁的得到的结果与用于完全加热的壁产生的结果进行比较。

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  • 来源
    《Heat transfer》 |2021年第3期|2220-2241|共22页
  • 作者

    Samy Alami; Mbarek Feddaoui; Abderrahman Nait Alla; Lahcen Bammou; Khalid Souhar;

  • 作者单位

    Laboratory of Energy Engineering Materials and Systems ENSA Ibn Zohr University Agadir Morocco;

    Laboratory of Energy Engineering Materials and Systems ENSA Ibn Zohr University Agadir Morocco;

    Laboratory of Energy Engineering Materials and Systems ENSA Ibn Zohr University Agadir Morocco High school of Technology of Casablanca University Hassan II Casablanca Morocco;

    Laboratory of Thermodynamics and Energetics Faculty of Sciences Ibn Zohr University Agadir Morocco;

    Laboratory of Energy Engineering Materials and Systems ENSA Ibn Zohr University Agadir Morocco;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    evaporation; numerical study; partially heated wall; turbulent liquid film; vertical tube;

    机译：蒸发;数值研究;部分加热的墙壁;湍流液体薄膜;垂直管;

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