Hello @SaiSan
it may still run and converge with time steps > CFL, but it is a dangerous game. If you have your model output, you can compute the CFL time step using dt=cfl_step(md,md.results.TransientSolution(i).Vx,md.results.TransientSolution(i).Vy). In general, what limits the CFL time step is regions with very fast velocities (which should be looked at if they become unrealistic).
I hope this helps
Mathieu
