I didn't intend to create this at all, but it turned out to be too interesting. I'm a sci fi artist by profession, but as a hobby I'm researching various speculative concepts like acoustic flying saucers and so on, and based on my experiments in fluid dynamics, I wanted to do CFD to test my hypothesis of vortex formation.
It was planned as a partial simulation simulating Brownian motion, All particles obey the same rules: they are attracted by Newtonian gravity, repel each other at short distances, and have active spin, transferring momentum to each other tangentially.