Yep the simulation runs fine. My mesh and setup is a good starting point. You can find the project here. Do copy it over to your side as I won’t keep user projects on my end for long and will delete them after awhile. Here is a quick gif of the run.
The end time is 0.4s with a Co of 1. Only 8 timesteps were saved hence the low frame rate. Flow separation indeed does occur and you can observe the convergence plots and all the relevant data in the project link.
From this point on, you should first check the CL/CD or some variable to see how much error the corase mesh produces and from there continually refine the mesh by keeping the geometrical values of the bounding box the same so as to keep computational costs down to a minimum. You should only touch the domain only if you have continually refined the needed areas significantly and the results don’t deviate significantly anymore, which would then indicate that the domain is the source of error.
You will also need a longer end time instead of my 0.4s. Maybe even double as from the point probes, the flow is still developing.
Do note to keep an eye on your node count as you mesh. This 200,000 node mesh already takes about 9 hours to simulate and 300 core hours so you can imagine what a longer timestep, change of relaxation factors and a finer mesh will do to the time needed for the simulation to complete.
Good luck and keep us posted on your progress.