Accuracy of discrete-velocity BGK models for the simulation of the incompressible Navier-Stokes equations (Q1905640)

Since 1988 the so-called lattice Boltzmann (LB) model is used to obtain the lattice gas automata retaining a number of characteristics of the Navier-Stokes equation. In this paper, the LB method is considered as a discretization of the discrete Boltzmann equation. It is shown numerically that the employed 9-velocity scheme converges to incompressible Navier-Stokes equation. The evolution of Taylor vortices in a periodic domain is chosen as a test problem. As mentioned by the authors, the ``time step restrictions require a tremendous number of computations to produce accuracy, thus degrading the overall performance of the method''.