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An open-source computational framework for immersed fluid-structure interaction modeling using FEBio and MFEM.

Ryan T Black1,2, Steve A Maas3,4, Wensi Wu1,5,6

  • 1Children's Hospital of Philadelphia, Department of Anesthesiology and Critical Care Medicine, Philadelphia, PA, USA.

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Summary
This summary is machine-generated.

This study introduces an open-source immersed fluid-structure interaction (FSI) framework, coupling MFEM and FEBio for advanced biomechanics simulations. It enables high-performance computing for complex problems like heart valve dynamics.

Keywords:
FEBioFluid-structure interactionHeart valveImmersed methodMFEMOpen-source software

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Area of Science:

  • Computational mechanics
  • Biomechanics
  • High-performance computing

Background:

  • Fluid-structure interaction (FSI) simulations in biology face computational hurdles, especially with large deformations and contact.
  • Traditional Arbitrary Lagrangian-Eulerian (ALE) methods struggle with mesh distortion in complex FSI scenarios.
  • Immersed methods offer a promising alternative to overcome mesh-related limitations in FSI.

Purpose of the Study:

  • To present a novel open-source immersed FSI framework.
  • To couple the MFEM and FEBio finite element libraries for enhanced biomechanical simulations.
  • To provide a high-performance computing solution for complex FSI problems in biological systems.

Main Methods:

  • Developed an immersed FSI framework by coupling MFEM (GPU-ready, parallel) and FEBio (nonlinear solid mechanics).
  • Employed a fictitious domain methodology with variational multiscale stabilization for accuracy on under-resolved grids.
  • Utilized a fully implicit, monolithic scheme for robust coupling of strongly coupled FSI.

Main Results:

  • The framework leverages MFEM's parallel performance and GPU acceleration for fluid dynamics.
  • It integrates FEBio's advanced constitutive models for hyperelastic and viscoelastic solids.
  • Demonstrated capabilities through test problems, including a 3D semilunar heart valve simulation.

Conclusions:

  • The developed framework addresses the need for open-source immersed FSI software.
  • It combines advanced biomechanics modeling with high-performance computing capabilities.
  • Offers a robust and extensible platform for simulating complex fluid-structure interactions in biological systems.