I am trying to model an oscillating cylinder. When using dynamic mesh with 6dof I get the negative volume error. I am using 2019 R2 so I have been using the motion input under the boundary conditions and not using a UDF. My simulations will run with the BC input, but I do not see any movement of the cylinder in post.
Setup: created fluid domain with the circle but out for cylinder. Inlet is 4D from cylinder, 4D above, and outlet is 10D down
Mesh: .0025m element size, named all sides
Setup: k-ep model, water is fluid, vel is 10m/s, cylinder motion set in BC with 10m/s and sinusoidal function in y direction, dynamic mesh described above.
Any help on fixing this issue would be appreciated.