@DaleKramer I think the hardest part is that we, me included, like to bite off a large chunk without understanding the overall complexity. We all see these really cool looking simulations on SimScale (F1 car, fighter jets, our favorite roadster) and the pictures all pass the eye test. Sure, the streamlines look somewhat right and the scalar plots are passable, but most of the simulations you see are just not correct.
Take my study of a Pinewood Derby car as a perfect example. It’s a block of wood with four cylindrical tires, how hard can it be. You saw the first part of just studying the wall bounded flow over a rectangular body. There is a lot to unpack there and we haven’t even started the complicated part.
@jhartung I applaud you for sticking with it to get the correct answer, not just a cool looking answer. I would advise you to possibly take a small step back and run some individual pieces of your simulation to determine what mesh resolution you need. Do you really need to worry about separation on the body? Are you running a high enough AoA that the wing flow separates? Some simple 2D runs would help answer those questions and give you a better idea on mesh and spacing for each part. Yes, it will take a lot longer to finish, but you don’t just want an answer, you want the right answer. Just my two cents.