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This study compares numerical methods for fluid-structure interaction (FSI) problems. Semi-implicit and loosely coupled schemes effectively avoid strong coupling without losing accuracy or stability, matching experimental data.

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Area of Science:

  • Computational fluid dynamics
  • Solid mechanics
  • Numerical analysis

Background:

  • Fluid-structure interaction (FSI) is crucial in many engineering fields.
  • Accurate and efficient numerical methods are needed for FSI simulations.
  • Partitioned procedures are common for solving complex FSI problems.

Purpose of the Study:

  • To compare and validate different partitioned solution procedures for incompressible FSI.
  • To assess the performance of strongly coupled, semi-implicit, and loosely coupled schemes.
  • To determine if strong coupling can be avoided without sacrificing accuracy or stability.

Main Methods:

  • Numerical simulation of incompressible fluid-structure interaction.
  • Implementation and comparison of three coupling families: strongly coupled, semi-implicit, and loosely coupled.
  • Validation against experimental fluid-structure interaction benchmark data.

Main Results:

  • Excellent agreement between numerical simulations and experimental benchmark results.
  • Demonstration that semi-implicit and loosely coupled schemes achieve high accuracy.
  • Confirmation that stability and accuracy are maintained when avoiding strong coupling.

Conclusions:

  • Partitioned solution procedures, including semi-implicit and loosely coupled schemes, are viable for FSI analysis.
  • Strong coupling can be computationally expensive and is often unnecessary for accurate FSI simulations.
  • The validated numerical methods provide reliable tools for future FSI research and engineering applications.