Fluid–structure interaction

Summary

Fluid–structure interaction is the coupled behaviour of a deformable solid and a fluid that flows around it or inside it. The fluid pushes on the solid, the solid deforms, and the deformation changes the domain and the boundary velocity of the fluid. The model couples the Navier–Stokes equations with the equations of elastodynamics through conditions on the moving interface. It explains flutter of wings, vibration of bridges in wind and the motion of heart valves and blood vessels.