Lattice Boltzmann study of two-phase hydrocarbon fluids based on Peng-Robinson free energy model

被引:3
作者
Yang, Xuguang [1 ]
Wang, Lei [2 ]
机构
[1] Hunan First Normal Univ, Sch Math & Computat Sci, Changsha 410205, Hunan, Peoples R China
[2] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Hubei, Peoples R China
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS C | 2018年 / 29卷 / 11期
关键词
Two-phase flow; Peng-Robinson equation of state; Cahn-Hilliard equation; lattice Boltzmann method; INCOMPRESSIBLE MULTIPHASE FLOWS; DIFFUSE INTERFACE MODEL; EQUATION; SIMULATION;
D O I
10.1142/S0129183118501073
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
In this paper, a lattice Boltzmann (LB) model is presented to study the two-phase hydrocarbon fluid systems. Based on the Peng-Robinson (P-R) free energy model, a Cahn-Hilliard type equation is derived to describe the interfacial properties. In the corresponding LB method, the gradient contribution of chemical potential is treated as source term, while the homogeneous part is put in the equilibrium distribution function, which guarantees its scale order in the Chapman-Enskog analysis. In the numerical experiments, the realistic hydrocarbon components of propane are numerically studied by the presented LB model in three dimensions. The numerical results show that the predicted surface tension and capillary pressure are in good agreement with laboratory data.
引用
收藏
页数:14
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