Default settings don't really do it justice IMHO. Try these:
Density diffusion: just a hair under 1(visually)
velocity diffusion: 0.99
pressure: 0.93
vorticity: 5
Density diffusion: just a hair under 1(visually)
velocity diffusion: 0.99
pressure: 0.93
vorticity: 5
Also, just setting Density Diffusion to 1 and leaving makes the movement slow enough to be able to screenshot nice wallpapers.
It was like a webpage as a wall paper.
Maybe ahead of it's time as it crashed constantly...