4.2 ; . Same backward step for different resolution. FREE-SLIP.

Resolution = 20.7 km
Resolution = 10.3 km	Resolution = 10.3 km. Smoother walls
Resolution = 5.7 km

See the reference state.
Check the color scale

• No convergence with increasing resolution to the reference state.
• No resolution sensitivity, contradictory to the previous case. It means that the circulation has already been changed because of the rotation.
• For the same resolution, the number of corners is not important (same conclusion as last subsection).