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Despite its limitations (no boundary layer effects, irrotational flow), the solution given by a potential flow solver is very fast and can be used in certain configuration to give a quick approximation of the fluid flow. In this example, after the solve of the potential flow, the pressure is passed to the solid mechanics solver (linear FSI) and the vibrations of the structure can be analysed. The drag of the segment set is also output and can be used in a subsequent solid only analysis.