Enriched space-time finite elements for fluid-structure interaction
DOI:
https://doi.org/10.13052/REMN.17.725-736Keywords:
fluid structure interaction, space-time finite elements, incompatible meshes, enrichment, partition of unity, XFEMAbstract
This paper presents a new numerical approach to deal with fluid structure interaction problems where a thin structure is immersed in an incompressible fluid. Spacetime finite elements are used to discretized the equations using a discontinuous time scheme. In order to take into account the discontinuities due to the structure in the fluid domain, the approximation fluid fields are enriched with appropriate discontinuous functions through a partition of unity (XFEM). The method allows incompatible meshes between fluid and structure, the structure mesh can move freely in the fluid fixed Eulerian mesh.
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