A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures
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Publication Date
2022Journal Title
Journal of Applied Physics
ISSN
0021-8979
Publisher
AIP Publishing
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Wallis, T., Barton, P., & Nikiforakis, N. (2022). A unified diffuse interface method for the interaction of rigid bodies with elastoplastic solids and multi-phase mixtures. Journal of Applied Physics https://doi.org/10.1063/5.0079970
Abstract
This work outlines a new multi-physics-compatible immersed rigid body method
for Eulerian finite-volume simulations. To achieve this, rigid bodies are
represented as a diffuse scalar field and an interface seeding method is
employed to mediate the interface boundary conditions. The method is based on
an existing multi-material diffuse interface method that is capable of handling
an arbitrary mixture of fluids and elastoplastic solids. The underlying method
is general and can be extended to a range of different applications including
high-strain rate deformation in elastoplastic solids and reactive fluid
mixtures. As such, the new method presented here is thoroughly tested through a
variety of problems, including fluid-rigid body interaction,
elastoplastic-rigid body interaction, and detonation-structure interaction.
Comparison is drawn between both experimental work and previous numerical
results, with excellent agreement in both cases. The new method is
straightforward to implement, highly local, and parallelisable. This allows the
method to be employed in three dimensions with multiple levels of adaptive mesh
refinement using complex immersed geometries. The rigid body field can be
static or dynamic, with the THINC interface reconstruction method being used to
keep the interface sharp in the dynamic case.
Sponsorship
EPSRC and AWE.
Funder references
Engineering and Physical Sciences Research Council (EP/L015552/1)
Identifiers
External DOI: https://doi.org/10.1063/5.0079970
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334171
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