Comment by doop

I was under the impression that lattice gas methods in CFD were more or less obsolete. They're nice in that they're unconditionally stable and only use bitwise operations, but the amount of CPU time you save from this is massively outweighed by the number of simulation runs you need to do to average out the noise. They're also not Galilean invariant (at least not without messing around with rescaling factors). Lattice Boltzmann is much more practical.