Lattice Boltzmann model approximated with finite difference expressions
Résumé
We show that the asymptotic properties of the link-wise artificial com-pressibility method are not compatible with a correct approximation of fluid properties. We propose to adapt the previous method through a framework suggested by the Tay-lor expansion method and to replace first order terms in the expansion by appropriate three or five points finite differences and to add non linear terms. The " FD-LBM " scheme obtained by this method is tested in two dimensions for shear wave, Stokes modes and Poiseuille flow. The results are compared with the usual lattice Boltzmann method in the framework of multiple relaxation times.
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