Comment on the paper J. G. Zhou, Rectangular lattice Boltzmann method, Phys. Rev. E 81, 026705 (2010)

It is shown both analytically and numerically that the suggested lattice Boltzmann model on rectangular grids leads to anisotropic dissipation of fluid momentum and thus it does not recover Navier-Stokes equations. Hence, it cannot be used for the simulation of hydrodynamics.