A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures

This work outlines a new multi-physics-compatible immersed rigid body method for Eulerian finite-volume simulations. To achieve this, bodies are represented as diffuse scalar field and an interface seeding is employed to mediate the boundary conditions. The based on existing multi-material that capable of handling arbitrary mixture fluids elastoplastic solids. underlying general can be extended range different applications including high-strain rate deformation in solids reactive fluid mixtures. As such, presented here thoroughly tested through variety problems, fluid-rigid interaction, elastoplastic-rigid detonation-structure interaction. Comparison drawn between both experimental previous numerical results, with excellent agreement cases. straightforward implement, highly local, parallelisable. allows three dimensions multiple levels adaptive mesh refinement using complex geometries. static or dynamic, THINC reconstruction being used keep sharp dynamic case.