.png){kind=icon}
返回
A thermodynamically consistent and conservative diffuse-interface model for gas/liquid-liquid-solid flows
.png){kind=icon}
PRE
AI
DOI：10.1016/j.jcp.2025.113949.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
In this work, a thermodynamically consistent and conservative diffuse-interface model for gas/ liquid-liquid-solid flows is proposed. In this model, a novel free energy for the gas/liquid-liquidsolid system is established according to a ternary phase-field model, and it not only contains the standard bulk and interface free energies for two-phase flows, but also includes some additional terms to reflect the penalty in the solid phase and the wettability on the solid surface. Furthermore, a smooth indicator function of the solid phase is also introduced in the consistent Navier-Stokes equations to achieve a high viscosity in the solid phase, and to preserve the velocity boundary conditions on the solid surface by the force caused by fluid-structure interaction. Based on the proposed diffuse-interface model, the fluid interface dynamics, the fluid-structure interaction, and the wetting property of the solid surface can be described simply and efficiently. Additionally, the total energy is also proved to be dissipative for the two-phase flows in the stationary geometries. To test the present diffuse-interface model, we develop a consistent and conservative lattice Boltzmann method and conduct some simulations. The numerical results also confirm the energy dissipation and good capability of the proposed diffuse-interface model in the study of two-phase flows in complex geometries and two-phase flows with moving particles.
Keyword:
Phase-field model
Energy dissipation
Two-phase flows in complex geometries
Two-phase flows with moving particles
