Reply To: Dynamic mesh for falling object in contact with surface

[Federico]

Hello, 

How exactly are you prescribing the motion of the fin? If this fin is moving as a rigid body, then you really only need to set the motion to the walls of the fins, and the interior cells will follow.

For question 2, you will need to create a mesh interface between the fin and the stationary heating bar. This will allow your fin to "slide" along the heating bar.