# Simulation of Capillary-Driven Kinetics with Multi-Phase-Field and Lattice-Boltzmann Method

## TL;DR

This paper introduces a combined multi-phase-field and lattice Boltzmann computational approach to simulate capillary-driven motion of solid particles, enabling detailed study of liquid-phase sintering and particle dynamics.

## Contribution

The paper presents a novel integrated method for simulating capillary-driven solid particle motion, validated against analytic solutions and applied to complex multi-particle systems.

## Key findings

- Method accurately reproduces analytic solutions for simple cases.
- Liquid morphology significantly influences particle dynamics.
- Suitable for studying liquid-phase sintering processes.

## Abstract

We propose a combined computational approach based on the multi-phase-field and the lattice Boltzmann method for the motion of solid particles under the action of capillary forces. The accuracy of the method is analyzed by comparison with the analytic solutions for the motion of two parallel plates of finite extension connected by a capillary bridge. The method is then used to investigate the dynamics of multiple spherical solid bodies connected via capillary bridges. The amount of liquid connecting the spheres is varied, and the influence of the resulting liquid-morphology on their dynamics is investigated. It is shown that the method is suitable for a study of liquid-phase sintering which includes both phase transformation and capillary driven rigid body motion.