Finite Difference Lattice Boltzmann Method on Gas-Liquid Flow
A novel model of the finite difference lattice Boltzmann method (FDLBM) was proposed to simulate the gas-liquid flow. The surface tension effect was realized by introducing the body force term based on the Continuum Surface Force (CSF) method. The recoloring step of the immiscible multiphase model was replaced by the anti-diffusion scheme in the mixed region to reduce the side-effect and control the thickness of the interface. The effect of the large density ratio was incorporated by applying acceleration modification which was deduced on macroscopic dynamics. Compressibility of fluids is adjustable in model and the sound speed of the fluids can be controlled easily. With the current model, two problems gas-liquid flow were studied. One is the liquid column collapse, and the other is the droplet splashing on thin film. For the first case, the numerical results agree well with the available experimental data. For second one, the spread factor of the liquid sheet emitted after the droplet impact in our simulation follows known spreading power law.
Finite difference lattice Boltzmann method Multiphase flow Water drop Compressibility Droplet splashing Liquid column collapse
L.Wu M.Tsutahara S.Tajiri
EXA Japan Inc.,Kitasaiwai,Nishi-ku,Yokohama,Yokohama 220-0004 Japn Graduate School of Engineering,Kobe University,Nada,Kobe 657-8501 Japan
国际会议
南京
英文
1-10
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）