Validation of a non-conforming monolithic fluid-structure interaction method using phase-contrast MRI.

Area of Science:

• Computational fluid dynamics
• Fluid-structure interaction (FSI)
• Numerical simulation

Background:

• Validation of computational methods is crucial for scientific accuracy.
• Experimental benchmarks provide essential data for method verification.
• Accurate simulation of fluid-structure interaction is vital in many engineering fields.

Purpose of the Study:

• To validate a non-conforming arbitrary Lagrangian-Eulerian fluid-structure interaction technique.
• To assess the performance of inf-sup stable and general Galerkin schemes in FSI simulations.
• To compare numerical predictions with experimental phase-contrast magnetic resonance imaging data.

Main Methods:

• Utilized a 3D fluid-structure interaction benchmark problem for validation.
• Conducted numerical experiments for steady and transient test cases.
• Employed spatial refinement, fluid domain truncation, and varying time step sizes.
• Quantified convergence to steady-state using error norm computations.

Main Results:

• Demonstrated very good overall agreement between numerical results and experimental data.
• Validated the accuracy of the non-conforming arbitrary Lagrangian-Eulerian FSI technique.
• Observed accurate prediction of flow patterns seen in the experiment.

Conclusions:

• The validated FSI technique accurately predicts complex fluid-structure interactions.
• The study provides confidence in using this numerical method for similar engineering problems.
• Phase-contrast magnetic resonance imaging is a valuable tool for FSI benchmark validation.