Simulation of capillary phase transition flow based on lattice Boltzmann method

  • GAO Hong-tao ,
  • ZHONG Guan-cui ,
  • LV Wei ,
  • JI Xiu-peng ,
  • HONG Jia-ju
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  • Institute of Refrigeration & Cryogenics Engineering, Dalian Maritime University, Dalian 116026,China)

Received date: 2018-01-30

  Revised date: 2018-03-13

  Online published: 2018-03-19

Abstract

A new non isothermal lattice Boltzmann model describing the phase transition of gas and liquid was established by coupling the free energy model of large density two phase flow with the lattice thermal model to simulate the process of internal throttling in capillary tube. Simulation results show that the pressure drop in the tube is an important factor to drive the capillary flow phase transition. At the same time, it is found that there is a high temperature zone between the two phases of the gas and liquid, which indicates that the liquid closing to the interface can absorb heat from the high temperature area continually in the process of phase transition until it evaporates into gas completely. Simulation results show that the velocity of the gas in the central area is much higher than that of the liquid around. The mechanism of capillary phase transition is explained in a more subtle way by the Lattice Boltzmann method.

Cite this article

GAO Hong-tao , ZHONG Guan-cui , LV Wei , JI Xiu-peng , HONG Jia-ju . Simulation of capillary phase transition flow based on lattice Boltzmann method[J]. Journal of Dalian Maritime University, 2018 , 44(4) : 99 -105 . DOI: 10.16411/j.cnki.issn1006-7736.2018.04.015

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