I want to see the flow disturbances caused by a solid disk moving in a fluid. I have a disk mesh that moves relative to the fluid around it. The disk is on the bottom of a cylinder of water.
In solution animations I see the disk move however it's walls do not appear to affect flow. Vectors and pathlines of the solution go right through the disk. The disk is set as a wall and its material solid aluminum.
Why does the disk act like a ghost, no showing any affect on the water around it, in solution animations?