Pseudopotential multiple-relaxation-time lattice Boltzmann simulation of vapor condensation on vertical subcooled walls

TL;DR

This paper presents an improved pseudo-potential multiple-relaxation-time lattice Boltzmann method for simulating vapor condensation on subcooled walls, accurately capturing phase change and droplet evaporation under gravity.

Contribution

The study introduces a coupled LB and finite difference method for phase change simulation, enhancing accuracy in vapor condensation modeling.

Findings

Validated the model with D-2 law of droplet evaporation.

Successfully simulated vapor condensation on subcooled walls.

Improved phase-change simulation accuracy.

Abstract

Saturated vapor condensation on the homogeneous and heterogeneous sub-cooled wall under gravity was numerically simulated by the improved pseudo-potential phase-change multiple-relaxation-time lattice Boltzmann (LB) method. Firstly, the phase-change LB method coupling finite different method to solve the energy equation was verified by the D-2 law of the droplets evaporation, which improve the model could precisely realize the numerical simulation of phase change.