Thermodynamic-consistent lattice Boltzmann model for nonideal fluids.

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. [ABSTRACT FROM AUTHOR]