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An Isotropic, Galilean Invariant BGK Model

  Here we derive an equilibrium distribution which is intrinsically isotropic and Galilean invariant. The continuity equation and the Navier-Stokes equation are then derived from the single relaxation time lattice Boltzmann equation by performing a Chapman-Enskog expansion and considering the conservation of mass and momentum. The method followed will be the same as in reference [47], however here we consider a hexagonal lattice rather than a square one.





James Buick
Tue Mar 17 17:29:36 GMT 1998