CONVERGENCE OF CONVECTIVE-DIFFUSIVE LATTICE BOLTZMANN METHODS

Lattice Boltzmann methods are numerical schemes derived as a kinetic approximation of an underlying lattice gas. PI numerical convergence theory for nonlinear convective-diffusive lattice Boltzmann methods is established. Convergence, consistency, and stability are defined through truncated Hilbert expansions. In this setting it is shown that consistency and stability imply convergence. Monotone lattice Boltzmann methods are defined and shown to be stable, and hence convergent when consistent. Examples of diffusive and convective-diffusive lattice Boltzmann methods that are both consistent and monotone are presented.