  The present work proposes an approach for fluid-solid and contact interaction
problems including thermo-mechanical coupling and reversible phase transitions.
The solid field is assumed to consist of several arbitrarily-shaped,
undeformable but mobile rigid bodies, that are evolved in time individually and
allowed to get into mechanical contact with each other. The fluid field
generally consists of multiple liquid or gas phases. All fields are spatially
discretized using the method of smoothed particle hydrodynamics (SPH). This
approach is especially suitable in the context of continually changing
interface topologies and dynamic phase transitions without the need for
additional methodological and computational effort for interface tracking as
compared to mesh- or grid-based methods. Proposing a concept for the
parallelization of the computational framework, in particular concerning a
computationally efficient evaluation of rigid body motion, is an essential part
of this work. Finally, the accuracy and robustness of the proposed framework is
demonstrated by several numerical examples in two and three dimensions,
involving multiple rigid bodies, two-phase flow, and reversible phase
transitions, with a focus on two potential application scenarios in the fields
of engineering and biomechanics: powder bed fusion additive manufacturing
(PBFAM) and disintegration of food boluses in the human stomach. The efficiency
of the parallel computational framework is demonstrated by a strong scaling
analysis.
