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首页> 外文期刊>International Journal of Heat and Mass Transfer >A modified phase change pseudopotential lattice Boltzmann model
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A modified phase change pseudopotential lattice Boltzmann model

机译：改进的相变伪势格子Boltzmann模型

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摘要

Amongst all the multiphase models in the lattice Boltzmann (LB) community, the pseudopotential model has been the most popular approach due to its simplicity and high-efficiency. Recently a number of liquid-vapour phase change models were also proposed based on the pseudopotential LB model. Our study finds that most of the published pseudopotential phase change models rely on an entropy-based energy equation, while the entropy-based energy equation is derived with the equation of state of ideal gas. That means this entropy-based energy equation is not completely suitable for multiphase flow which applies non-ideal equation of state for the phase separation simulation. Therefore a new phase change LB model is proposed in this work, where an improved pseudopotential multiphase model [32] and a modified energy equation which is solved in the classical fourth-order Runge-Kutta scheme are coupled in a hybrid scheme. The results show that the numerical simulation can capture the basic liquid-vapour phase change features. TheD2law for droplet evaporation is validated and the square of diameter variation is in good agreement with experimental data. Moreover, the three boiling stages (nucleate boiling, transition boiling and film boiling) are accomplished using the modified model, and the corresponding transient heat fluxes are presented.
机译：在晶格玻尔兹曼（LB）社区的所有多相模型中，伪势模型由于其简单性和高效性而成为最受欢迎的方法。最近，还基于准电势LB模型提出了许多液汽相变模型。我们的研究发现，大多数已发布的伪电势相变模型都依赖于基于熵的能量方程，而基于熵的能量方程是通过理想气体的状态方程导出的。这意味着基于熵的能量方程式并不完全适用于将非理想状态方程用于相分离模拟的多相流。因此，在这项工作中提出了一个新的相变LB模型，其中在混合方案中耦合了改进的伪势多相模型[32]和经典的四阶Runge-Kutta方案求解的改进的能量方程。结果表明，数值模拟可以捕获液体的基本相变特征。验证了液滴蒸发的D2律，直径变化的平方与实验数据吻合良好。此外，使用改进的模型完成了三个沸腾阶段（核沸腾，过渡沸腾和膜沸腾），并给出了相应的瞬态热通量。

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  • 作者

    W. Gong; Y.Y. Yan; S. Chen; E. Wright;

  • 作者单位

    Fluids and Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham;

    Fluids and Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham,Center for Fluids and Thermal Engineering, University of Nottingham;

    Fluids and Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham;

    Fluids and Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham;

  • 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

    Pseudopotential lattice Boltzmann; Phase change; Energy equation;

    机译：伪势格玻尔兹曼;相变;能量方程;

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