A Vapor-Liquid Phase Change Model for Two-Phase Boiling and Condensation

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A Vapor-Liquid Phase Change Model for Two-Phase Boiling and Condensation

更新时间：2025-07-09

- A Vapor-Liquid Phase Change Model for Two-Phase Boiling and Condensation
- Vol. 46, Issue 7, Pages: 7-11(2012)
- 作者机构：
  
  华北电力大学新能源电力系统国家重点实验室,北京,102206
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK124
- Online First：10 July 2012，
  
  Published：2012
- 稿件说明：
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A Vapor-Liquid Phase Change Model for Two-Phase Boiling and Condensation[J]. 2012, 46(7): 7-11.
DOI：

A Vapor-Liquid Phase Change Model for Two-Phase Boiling and Condensation[J]. 2012, 46(7): 7-11. DOI：

摘要

为了更精确简单地求解两相流中的蒸发和冷凝问题

基于FLUENT中的流体体积(VOF)方法提出了一种气液相变模型

该模型适应于两相中一相为非饱和相

即处于过热或过冷状态

另一相为饱和相

即处于饱和状态.该气液相变模型中:非饱和相导热系数和比热容为真实的物性参数; 假设饱和相导热系数等于0

饱和相比热容等于非饱和相比热容; 界面处相变率仅由非饱和相决定.最后

通过一维Stefan问题相界面位置的分析解和二维膜态沸腾气相体积比的精确解

验证了该相变模型的精确性和可行性.文中工作为该相变模型的推广应用奠定了基础.

Abstract

A vapor-liquid phase change model on the basis of the volume of fluid(VOF)method in FLUENT was proposed to solve the two-phase boiling or condensation problems. This model is suitable for the case where one is unsaturated phase and the other is saturated phase. In the model proposed here

the unsaturated-phase thermal conductivity and specific heat are actual physical parameters; the saturated-phase thermal conductivity is assumed to be zero and the saturated-phase specific heat is assumed to equal the unsaturated-phase specific heat; the interfacial mass-transfer rate is determined only by the unsaturated phase. In addition

our phase change model was verified by the analytical solutions of the one-dimensional Stefan problem and the accurate results of the two-dimensional boiling problem. The work will lay a foundation for the application of this model.

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references

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