I want to modify the perpendicular-flap case from a beam to a baffle, because my flap is very thin. I used 'createBaffle` to create an internal wall which are actually two identical faces (one is master, the other is slave). How should I set the interface? I found if I set the interface with the master one, the force is transferred to solid solver correctly for the first time step, but the displacement from the solid solver cannot be transferred back to OpenFOAM, so the force for the following step does not update (keep the same). On the contrary, if the slave face is used, the force and displacement can be updated at each time step, but the force direction seems to be opposite.
I wonder if it is possible to use a baffle as an interface for OpenFOAM. If yes, how to set the interface? Do I need to set both internal faces (master and slave) as interface? Then how do I take care of the interface in solid part which I only have one face to deflect? Ideally, I hope to only handle one interface since the two faces are identical, at least, they should deform the same if I set the displacement in the solid part.