A generalized conservative phase-field simplified lattice Boltzmann method for miscible and immiscible ternary flows with large density ratio

2022 ◽  
pp. 103978
Author(s):  
Shi-Ting Zhang ◽  
Jin-Xiang Zhou ◽  
Hong-Wei Xiao ◽  
Xiao-Dong Niu ◽  
Huaxian Wei ◽  
...  
Keyword(s):  
Lattice Boltzmann Method ◽  
Phase Field ◽  
Lattice Boltzmann ◽  
Density Ratio ◽  
Large Density ◽  
Large Density Ratio ◽  
Boltzmann Method

Improvement of Two-Component Model of the Finite Difference Lattice Boltzmann Method for a Gas-Liquid Flow Simulation

2007 ◽  
Author(s):  
Shinsuke Tajiri ◽  
Michihisa Tsutahara ◽  
Long Wu
Keyword(s):  
Finite Difference ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Density Ratio ◽  
Flow Simulation ◽  
Surface Force ◽  
Large Density ◽  
Two Component ◽  
Large Density Ratio ◽  
Boltzmann Method

An Improved model of the finite difference lattice Boltzmann method which allows us to consider gas-liquid two component flows with a large density ratio like air-water flows was proposed. Simulations of the two component fluids which have a free interface and a large density ratio were demonstrated. The model which has compressibility of fluid and allows us to consider the pressure waves propagating in water like water hammers was presented. The basic idea is to decrease a density fluctuation by giving a large pressure gradient. The compressibility of liquid was controlled by choosing the bulk modulus. In order to simulate immiscible two fluids, the modulated diffusion scheme proposed by Latva-Kokko et al. was employed. The scheme is able to produce a smooth interface by allowing a certain amount of interface diffusion. The continuum surface force proposed by Brackbill et al. was employed as surface tension. A collapse of liquid column was calculated in order to confirm the relation between the inertia of liquid with a large density and the gravity, and the appropriate result was obtained.

scholarly journals Phase-field-based lattice Boltzmann modeling of large-density-ratio two-phase flows

2018 ◽  
Vol 97 (3) ◽  
Author(s):  
Hong Liang ◽  
Jiangrong Xu ◽  
Jiangxing Chen ◽  
Huili Wang ◽  
Zhenhua Chai ◽  
...  
Keyword(s):  
Phase Field ◽  
Lattice Boltzmann ◽  
Density Ratio ◽  
Two Phase Flows ◽  
Two Phase ◽  
Large Density ◽  
Large Density Ratio ◽  
Lattice Boltzmann Modeling
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