Lattice Boltzmann simulation of liquid vapor system by incorporating a surface tension term  

作　　者：宋保维 任峰 胡海豹 黄桥高 

机构地区：[1]School of Marine Science and Technology, Northwestern Polytechnical University

出　　处：《Chinese Physics B》2015年第1期377-381,共5页中国物理B（英文版）

基　　金：Project supported by the National Nature Science Foundation of China(Grant No.51109178);the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20116102120009)

摘　　要：In this study, we investigate the pseudopotential multiphase model of lattice Boltzmann method（LBM） and incorporate a surface tension term to implement the particle interaction force. By using the Carnahan–Starling（CS） equation of state（EOS） with a proper critical pressure–density ratio, a density ratio over 160000 is obtained with satisfactory numerical stability. The added surface tension term offers a flexible choice to adjust the surface tension strength. Numerical tests of the Laplace rule are conducted, proving that smaller spurious velocity and better numerical stability can be acquired as the surface tension becomes stronger. Moreover, by wall adhesion and heterogeneous cavitation tests, the surface tension term shows its practical application in dealing with problems in which the surface tension plays an important role.In this study, we investigate the pseudopotential multiphase model of lattice Boltzmann method（LBM） and incorporate a surface tension term to implement the particle interaction force. By using the Carnahan–Starling（CS） equation of state（EOS） with a proper critical pressure–density ratio, a density ratio over 160000 is obtained with satisfactory numerical stability. The added surface tension term offers a flexible choice to adjust the surface tension strength. Numerical tests of the Laplace rule are conducted, proving that smaller spurious velocity and better numerical stability can be acquired as the surface tension becomes stronger. Moreover, by wall adhesion and heterogeneous cavitation tests, the surface tension term shows its practical application in dealing with problems in which the surface tension plays an important role.

关 键 词：lattice Boltzmann method surface tension pseudopotential model numerical stability 

分 类 号：O552.421[理学—热学与物质分子运动论]