topic Re: double gravity double pressure and a rotating object problem in CFD Forum

topic Re: double gravity double pressure and a rotating object problem in CFD Forum https://forums.autodesk.com/t5/cfd-forum/double-gravity-double-pressure-and-a-rotating-object-problem/m-p/5676090#M22078 Thank you, the gravity come right, but I got an other question if you dont mind.Is it possible to simluate the force required to move and accel an object agains the water pressure and the drag in autodesk cfd? The pressure seems not moving the object in free motion, but maybe my setup wrong. The model is that a cylinder moving out from  the block and I want to know how much force it requires to do this by cfd calculating it for me. My first approach is that I set it to free motion and free surface that water does extert force on it, and I increase the applieed force (roughly hand calculated first) and see if it is moving.  It didnt work. So i wonder if its possible because help file says free motion is always flow driven, And this case would be the other way around free motion causes flow. <IMG alt="forcerequired.jpg" border="0" title="forcerequired.jpg" src="https://forums.autodesk.com/t5/image/serverpage/image-id/173371i169DB0DAAAE64AC4/image-size/original?v=mpbl-1&px=-1" />        Sat, 13 Jun 2015 10:40:24 GMT nagypetern95 2015-06-13T10:40:24Z