The immersed/fictitious element method for fluid-structure interaction: Volumetric consistency, compressibility and thin members

Hongwu Wang, Jack Chessa, Wing K. Liu, Ted Belytschko*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

A weak form and an implementation are given for fluid-structure interaction by the immersed/fictitious element method for compressible fluids. The weak form is applicable to models where the fluid is described by Eulerian coordinates while the solid is described by Lagrangian coordinates, which suits their intrinsic characteristics. A unique feature of the method is the treatment of the fictitious fluid by a Lagrangian description, which simplifies the interface conditions. Methods for enforcing volumetric consistency between the fluid and solid and treating thin members are given. Although a compressible viscous fluid is considered here, the new developments can be applied to incompressible fluids.

Original languageEnglish (US)
Pages (from-to)32-55
Number of pages24
JournalInternational Journal for Numerical Methods in Engineering
Volume74
Issue number1
DOIs
StatePublished - Apr 2 2008

Keywords

  • FSI
  • Fluid-structure interaction
  • Immersed/fictitious element

ASJC Scopus subject areas

  • Numerical Analysis
  • Engineering(all)
  • Applied Mathematics

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