Fluent Boundary Conditions Lifting object out of water
 

Dear everyone,


I have a question regarding ANSYS fluent.
My geometry is attached in a photo.
A cylinder is lifted out of water, I use two way symmetry to simplify the problem.
Afterwards I create the water based on the CAD model. There is a tiny gap between the cylinder and the vat. This why I get a little area in the corner.
I have tried two different meshes attached with photos.
I hope this setup is fine. Please correct me if I am wrong.

Next I set up the calculation. I have chosen the free surface (top of the water) not covered by the cylinder as a pressure inlet. Is that correct? I get a lot of reverse flow.
Then the calculation is a transient calculation as I lift the cylinder out of the water. I used remeshing by layering. This gives me about 15 calculation steps until my solution diverges. Can anyone comment on that?

My question: Can someone give advice on boundary conditions?
Does anyone have experience with remeshing?

I am thankful for any help you can give

Kind regards
Daniel