Paper Image

Phase-field modeling of two-phase flow in complex geometries

Published on:

9 November 2023

Primary Category:

Fluid Dynamics

Paper Authors:

Chengjie Zhan,

Zhenhua Chai,

Baochang Shi

Bullets

Key Details

Proposes a ternary phase-field model for simulating two-phase flow in complex geometries

Uses a single Cahn-Hilliard equation with modifications for mass conservation and boundedness

Models surface tension via an expression relating interfacial tensions to contact angle and curvature

Modifies Navier-Stokes equations to impose no-slip at diffuse solid boundaries

Employs a lattice Boltzmann numerical method with several enhancements

AI generated summary

Phase-field modeling of two-phase flow in complex geometries

This paper proposes a phase-field model to simulate two-phase flow in complex geometries. It represents the geometry using a smoothed indicator function and models the physics with a Cahn-Hilliard equation coupled to the Navier-Stokes equations. Key features include a formulation for surface tension that accounts for contact angle and curvature, degenerate mobility to prevent unphysical mass transfer, and modifications to the Navier-Stokes equations to impose no-slip at boundaries. The model is solved numerically using a tailored lattice Boltzmann method. Several validations and applications demonstrate the approach's capabilities for interfacing two-phase flow with complex stationary and moving boundaries.

Answers from this paper

Comments

No comments yet, be the first to start the conversation...

Sign up to comment on this paper

Sign Up