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Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
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A coupled sharp-interface immersed boundary-finite-element method for flow-structure interaction with application to

X Zheng1, Q Xue, R Mittal

  • 1Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.

Journal of Biomechanical Engineering
|November 2, 2010
PubMed
Summary
This summary is machine-generated.

A novel computational method accurately simulates complex flow-structure interactions (FSI), including vocal fold dynamics during phonation. This robust solver enhances understanding of fluid dynamics and biomechanics in speech production.

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Area of Science:

  • Computational Fluid Dynamics (CFD)
  • Biomechanics
  • Acoustics

Background:

  • Accurate simulation of flow-structure interaction (FSI) is crucial for understanding complex physical phenomena.
  • Existing methods often struggle with intricate geometries, three-dimensional flows, and viscoelastic materials.
  • Vocal fold dynamics during phonation present a significant challenge due to complex fluid-structure coupling.

Purpose of the Study:

  • To introduce a new, robust, and high-fidelity computational method for solving complex FSI problems.
  • To validate the developed FSI solver using established results for vocal fold vibration simulations.
  • To investigate the onset of phonation and the dynamics of the glottal jet using the validated solver.

Main Methods:

  • Coupling a sharp-interface immersed boundary method (IBM) flow solver with a finite-element method (FEM) based solid dynamics solver.
  • Development of a high-fidelity FSI solver capable of handling three-dimensional flows and viscoelastic solids.
  • Validation through qualitative and quantitative comparisons with established results for two- and three-dimensional vocal fold models.

Main Results:

  • The coupled FSI solver demonstrates robustness and high fidelity for complex FSI scenarios.
  • Simulations of vocal fold vibrations show good agreement with established data, confirming solver accuracy.
  • The solver successfully studied the onset of phonation in a 2D laryngeal model and glottal jet dynamics in a 3D model.

Conclusions:

  • The presented coupled FSI method offers a powerful tool for simulating intricate flow-structure phenomena.
  • The validated solver provides reliable insights into the biomechanics of phonation and vocal fold dynamics.
  • This approach advances the simulation capabilities for complex biological systems involving fluid-structure interactions.