Your runs are diverging to unphysically high results. The (or one of the) culprits in this case is your mesh. Its quality could definitely be improved. Take a peek at the meshing log:
You can either stick to the standard mesher and try to get a better mesh quality by means of local refinements (keep an eye on the meshing log aswell!):
Or you can try to switch for a hex dominant (parametric, preferably), so you have extra control over your mesh/refinements. So as a first measure, I’d try to get a better mesh.
There are also some things you can change in numerics to try and get a more stable simulation. These would be things to try after you get a better mesh (in case divergence persists):
- tweaking relax factors;
- adding non orthogonal correctors;
- using first order schemes for divergence terms - although it’s not recommended for “final results”, since 1st order schemes are diffusive in nature.
- if everything fails, there could be issues with boundary conditions or some other user error.
For future reference, it’s a good idea to keep an eye on your result controls as the simulations are running. If you can keep an eye on result controls while the simulations are running. If you see something like this, just stop the run to save some time.
Let us know if you need a bit more help than this, so people can jump in