Simulation of capillarity driven kinetics with phase-field and lattice Boltzmann

Raphael Schiedung , Ruhr Universität Bochum, Bochum, Germany
Marvin Tegler, Ruhr Universität Bochum, Bochum, Germany
Fathollah Varnik, Ruhr Universität Bochum, Bochum, Germany
Dmitry Medvedev, Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia

We propose a combined computational approach based on the multi-phase-field and the lattice Boltzmann methods for the motion of solid particles under the action of capillary forces. The accuracy of the method is analyzed by comparison with the analytical solutions for the force and 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.

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