Three-dimensional Numerical Simulation of Vapor Bubble Rising in Superheated Liquid by Lattice Boltzmann Method

doi:10.19596/j.cnki.1001-246x.7925

Abstract

Abstract: Dynamics behavior of a vapor bubble such as rising, growth and deformation in superheated liquid was simulated with three-dimensional lattice Boltzmann phase-change model. To study effect of heat and mass transfer on vapor bubble, process of bubble rising in isothermal system was simulated. It shows that deformation extent of vapor bubble is small in superheated liquid. It is suggested that the effect of phase-change on vapor bubble is similar to surface tension force, which makes vapor bubble tend to keep its initial shape. Rising velocity of vapor bubble in superheated liquid was smaller. It implied that the effect of drag force on vapor bubble was dominant in superheated situation. In addition, growth rate of vapor bubble reaches the maximum at initial stage; Then it tended to nearly a constant. As vapor bubble volume and velocity increase, influence of disturbance on flow field is more and more intense. Meanwhile, growth of vapor bubble and convection induced by bubble rising have great impact on evolution of temperature field.

Key words: superheated liquid, vapor bubble, lattice Boltzmann method, dynamics characteristic, heat and mass transfer

CLC Number:

O359

SUN Tao, LIU Zhibin, FAN Wei, QIN Haijie. Three-dimensional Numerical Simulation of Vapor Bubble Rising in Superheated Liquid by Lattice Boltzmann Method[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(6): 659-664.

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