Lattice Boltzmann method simulation on the flow of two immiscible fluids in complex geometry

This is the authors' abstract. We don't add key points for this paper.

The multicomponent nonideal gas lattice Boltzmann model by Shan and Chen (S-C) can be used to simulate the immiscible fluid flow. In this paper, we show that the relaxation constant τ ⩽ 1 is a necessary condition for the immiscible fluid flow in the S-C model. In a system with very complex boundary geometry, for 0.8 ⩽ τ ⩽ 1, the S-C model describes the immiscible flow quite well, and τ=1 is the best.