Simulation of immiscible two-phase flows based on a kinetic diffuse interface approach

Tao Chen (1, 2) , Victor Chéron (3) , Zhaoli Guo , Jorge César C Brändle de Motta (3) , Thibault Menard (3) , Lian-Ping Wang (4, 2)

1 College of Engineering [Beijing]
2 SUSTech - Southern University of Science and Technology
3 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
4 University of Delaware [Newark]

A direct numerical simulation (DNS) code is developed to simulate immiscible two-phase flows based on the recently developed discrete unified gas-kinetic scheme (DUGKS). This scheme simulates hydrodynamic equations of the quasi-incompressible Cahn-Hilliard-Navier-Stokes system by the use of two mesoscopic distributions and the proper design of their equilibrium distributions and source terms. Several immiscible two-phase flows are used to validate the scheme in both 2D and 3D, including a stationary droplet in 2D and 3D, the Rayleigh-Taylor flows, and two-phase homogeneous isotropic decaying turbulence. The results obtained by DUGKS are compared carefully to these from the literature and the ARCHER code, i.e., a Coupled Level Set-Volume of Fluid (CLSVOF) method. The comparisons indicate that DUGKS is a promising scheme for direct numerical simulations of immiscible two-phase flows.

Mots clés: homogeneous isotropic turbulence; gas kinetic scheme; diffuse interface; immiscible two-phase flow

Domaines: Mécanique des fluides [physics.class-ph]

Tao Chen, Victor Chéron, Zhaoli Guo, Jorge César C Brändle de Motta, Thibault Menard, et al.. Simulation of immiscible two-phase flows based on a kinetic diffuse interface approach. International Conference on Multiphase Flow, May 2019, Rio de Janeiro, Brazil. ⟨hal-02315240⟩