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A Look on Fang Number

机译:看方号

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摘要

In this study, a look on Fang number (Fa) is presented. The Fa was introduced recently in 2013 by Professor Xiande Fang to provide great facilitation in describing flow boiling heat transfer coefficients. It is defined as the product of two terms. The first term is the ratio of buoyancy force to gravitational force, which has effects on bubble departure. The second term is the ratio of surface tension force to inertial force, which affects bubble formation. As a result, Fa is associated with the formation and departure of bubbles. The Fa will be expressed by using a combination of the Eoetvoes number (Eo), Froude number (Fr), and Weber number (We). Based on this study, it is clear that existing dimension-less numbers in literature, i.e., Eoetvoes number, Froude number, Weber number, and their combinations can be used to describe flow boiling heat transfer coefficients. This combination of existing non-dimensional groups (Eo, Fr, and We) leads to good correlation with flow boiling data of different working fluids such as CO_2,R134a,and R22.
机译:在这项研究中,提出了关于方数(Fa)的外观。方显德教授最近在2013年引入了Fa,为描述流沸腾传热系数提供了极大的便利。它定义为两个术语的乘积。第一项是浮力与重力之比,它对气泡偏离有影响。第二项是表面张力与惯性力之比,这会影响气泡的形成。结果,Fa与气泡的形成和离开有关。 Fa将通过同时使用Eoetvoes数(Eo),Froude数(Fr)和Weber数(We)来表示。基于该研究,很明显,文献中现有的无量纲数,即Eoetvoes数,Froude数,Weber数及其组合可用于描述流沸腾换热系数。现有无量纲(Eo,Fr和We)的这种组合导致与不同工作流体(例如CO_2,R134a和R22)的沸腾数据具有良好的相关性。

著录项

  • 来源
    《Journal of Heat Transfer》 |2014年第6期|064502.1-064502.2|共2页
  • 作者

    M. M. Awad;

  • 作者单位

    Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt 35516;

  • 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

    Fang number; Eotvos number; Froude number; Weber number;

    机译:牙号;Eotvos号;弗劳德数;韦伯数;

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