A flow-through cavity with movable top and flexible bottom. The low structural stiffness leads to a strong added mass effect. Only iterative coupling leads to a stable simulation. The Quasi-Newton relaxation is used in order to accelerate the convergence in each time step.

• Coupling type: Fluid-structure interaction (FSI)
• Analysis type: Implicit transient
• Special topics: Quasi-Newton relaxation, adaptive time step size
• Codes:
  • Fluid mechanics: FLUENT, OpenFOAM
  • Solid mechanics: Abaqus, MSC NASTRAN
• Quantities: NPosition, WallForce

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