Volume 112, Number 4, November 2015
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||03 December 2015|
Thermodynamic-consistent lattice Boltzmann model for nonideal fluids
1 Guangxi Key Lab of Multi-source Information Mining & Security, Guangxi Normal University Guilin 541004, China
2 Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences - Shanghai 201800, China
3 Shanghai Science Research Center, Chinese Academy of Sciences - Shanghai 201204, China
Received: 27 June 2015
Accepted: 11 November 2015
A lattice Boltzmann model to simulate phase separation and two-phase flow is proposed. The nonideal force in multiphase flow is directly computed from the free energy. Thermodynamic consistency and Galilean invariance are theoretically analyzed and numerically verified. Remarkably, the theoretical simplicity endues the model with the advantages of high efficiency and easy implementation. We also find that it can work well together with various equations of state in order to simulate different kinds of multiphase flows. Importantly, it has a tunable parameter κ, which can be used to reduce the effect of spurious current and adjust the surface tension to meet the requirements of researches.
PACS: 47.11.-j – Computational methods in fluid dynamics / 05.70.Ce – Thermodynamic functions and equations of state / 68.03.Cd – Surface tension and related phenomena
© EPLA, 2015
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