Some results on energy-conserving lattice Boltzmann models

Pierre Lallemand (1) , François Dubois (2, 3)

1 Chercheur indépendant
2 LM-Orsay - Laboratoire de Mathématiques d'Orsay
3 LMSSC - Laboratoire de Mécanique des Structures et des Systèmes Couplés

We consider the problem of ''energy conserving'' lattice Boltzmann models. A major difficulty observed in previous studies is the coupling between the viscous and thermal waves even at moderate wave numbers. We propose a theoretical framework based founded on the knowledge of the partial equivalent equations of the lattice Boltzmann scheme at several orders of precision. With the help of linearized models (inviscid and dissipative advective acoustics and classical acoustics), we suggest natural sets of relations for the parameters of lattice Boltzmann schemes. The application is proposed for three two-dimensional schemes. Numerical test cases for simple linear and nonlinear waves establish that the main difficulty in the previous contributions can now be overcome.

Mots clés: isotropy; Taylor expansion method; linearized Navier-Stokes

Domaines: Analyse numérique [math.NA]

Pierre Lallemand, François Dubois. Some results on energy-conserving lattice Boltzmann models. Computers & Mathematics with Applications, 2013, 65 (6), pp.831-844. ⟨10.1016/j.camwa.2012.11.007⟩. ⟨hal-00860832⟩