FSI simulation of a flexible hydrofoil
 

Hello everyone,
I am trying to do a two-way FSI simulation using cfx. To simplify the simulation I have removed the small gap between the hydrofoil and the domain's wall. Questions I have:
1- with Parallel to boundary condition imposed on the wall, can I assume the wall is rigid?
2- can the rigid wall limit the movement of the hydrofoil? (The movement I am receiving is smaller than that of the experimental results by a factor of 10!)
3- will smaller amplitudes affect the hydroelastic response of the hydrofoil? (where peak in frequencies occur).
Regards,
Karadakh