A novel two-dimensional coupled lattice Boltzmann model for incompressible flow in application of turbulence Rayleigh-Taylor instability

被引：35
|
作者：
Wei, Yikun [1 ]
Dou, Hua-Shu [1 ]
Qian, Yuehong [2 ]
Wang, Zhengdao [2 ]
机构：
[1] Zhejiang Sci Tech Univ, Fac Mech Engn & Automat, Key Lab Fluid Transmiss Technol Zhejiang Prov, Hangzhou 310018, Zhejiang, Peoples R China
[2] Shanghai Univ, Shanghai Key Lab Mech Energy Engn, Shanghai 200072, Peoples R China
来源：
COMPUTERS & FLUIDS | 2017年 / 156卷
基金：
中国国家自然科学基金;
关键词：
Lattice Boltzmann method; Convection; Incompressible flows; Numerical simulation; BGK MODEL; SIMULATION; CONVECTION;
D O I：
10.1016/j.compfluid.2017.07.003
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A novel coupled lattice Boltzmann model is developed for two-dimensional incompressible Rayleigh Taylor instability. a modified equilibrium distribution function (D2Q13)is proposed in this paper. The present model is stable and reliable up to temperature jumps between top and bottom walls of the order of 50 x the averaged bulk temperature. The regimes of mixing Rayleigh -Taylor instability are discussed using a simple scaling and the scaling relations obtained are validated by the present model. It is demonstrated that excellent agreement between the present results and the other numerical method or analytical solution shows that the present model is an efficient numerical method for Rayleigh -Taylor instability. (C) 2017 Published by Elsevier Ltd.
引用
收藏
页码：97 / 102
页数：6
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