Thanks @Retsam!
I’m new to simscale, and didn’t realize that the particle trace was an option. I played around with it a bit, it is very neat! Very useful to help understand what is happening. But what is the second screenshot that you provided? It also looks very useful, and I couldn’t figure out how to create it.
The results for the northwest simulation looked good, so it makes sense that the particle trace looks normal. It was the north simulation (which is different by 45 degrees) that was giving unreasonable results. But based on your suggestion, I ran a particle trace, and I think that explained the issue. In the north simulation, my velocity inlet was in the positive y direction, and I had my inlet velocity as a positive number. I think that this meant that it was sucking instead of blowing. I changed the inlet velocity to negative, and the results look much better.
My simulations for a west wind and a southeast wind both fail, and I haven’t been able to figure out why. One says that the velocity field started diverging, and the other that the pressure started diverging. Both give very unreasonable results before they fail. I looked at the position where it fails, but it isn’t on the surface of the building, and I can’t see any issues with the mesh. Are there other things I should look at for troubleshooting?