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Immersed Methods for Fluid-Structure Interaction.

Boyce E Griffith1, Neelesh A Patankar2

  • 1Departments of Mathematics, Applied Physical Sciences, and Biomedical Engineering, University of North Carolina, Chapel Hill, North Carolina 27599, USA.

Annual Review of Fluid Mechanics
|October 5, 2020
PubMed
Summary
This summary is machine-generated.

Immersed methods simplify fluid-structure interaction modeling by avoiding complex grid adjustments. These techniques are effective for simulating biological systems with large deformations and movements.

Keywords:
applications in medicine and biologyfluid–structure interactionimmersed boundary methodimmersed finite-element methodimmersed interface method

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Area of Science:

  • Computational fluid dynamics
  • Biomechanical modeling
  • Scientific computing

Background:

  • Fluid-structure interaction (FSI) is prevalent across biological scales.
  • Traditional methods often require complex, body-fitted grids.
  • Grid regeneration is computationally expensive for large deformations.

Purpose of the Study:

  • To review immersed methods for modeling fluid-structure interaction.
  • To cover both elastic structures and those with prescribed kinematics.
  • To highlight applications in biological and biomedical fields.

Main Methods:

  • Utilizes Eulerian fluid and Lagrangian structure descriptions.
  • Employs integral operators or direct jump conditions for interface coupling.
  • Avoids body-fitted discretizations, reducing grid regeneration needs.

Main Results:

  • Immersed methods effectively model thin and volumetric bodies.
  • Handles flexible, rigid, and kinematically prescribed structures.
  • Demonstrated effectiveness through benchmark problems and simulations up to Re=20,000.

Conclusions:

  • Immersed methods offer a robust framework for FSI problems.
  • These methods are particularly impactful for biological and biomedical simulations.
  • They provide a computationally efficient alternative to traditional approaches.