[YatengQ]

Dear forumers,

I'm simulating a 3D cylinder rotating in a cylinder zone filled with fluid. I just use fluid tut without solid model. So my problem is just a fluid zone with a wall of cylinder. The boundary condition is as follows:

p
tube wall:zeroGradient
Top.bottom.boundary: fixedValue uniform 0
u
tube wall:newMovingWallVelocity
Top:fixedValue uniform 0
bottom.boundary: zeroGradient

When I run the case in parallel(decompose 40 parts in z deriction), after 0.24s(0.001s time step) there are some errors, I list in the png file.

I'm not if the problem is from the mesh or the boundary condition.

[YatengQ]

fine, maybe the parallel running is the reason

[YatengQ]

When I try to simulate the rotation of the cylinder based on fluid tutorial，the grid seems to stick to a wall. I'm not sure if the dynamicMesh method is wrong.

I list the x-y cut plane of the mesh deformation and the dynamicMeshDict as follows.