WALL MOTION
 

Hi everybody! I've got a case where the wall is moving. the problem is that i can't find the reference frame to use in order to give this motion to the body!! in the Define/boundary conditions/wall-motion/ panel I choosed to give x & y velocity components of speed to the body but I don't find the real movement of the body when i check the result ! do I have to follow the grid reference frame (which am tring to do in vain)or are the velocities defined otherwise? thanks for any answer!