Journal of Computational Physics
Discrete Rotational Symmetry, Moment Isotropy, and Higher Order Lattice Boltzmann Models
Journal of Scientific Computing
Equivalent partial differential equations of a lattice Boltzmann scheme
Computers & Mathematics with Applications
Quartic parameters for acoustic applications of lattice Boltzmann scheme
Computers & Mathematics with Applications
Editorial: Mesoscopic Methods in Engineering and Science
Computers & Mathematics with Applications
Some results on energy-conserving lattice Boltzmann models
Computers & Mathematics with Applications
On rotational invariance of lattice Boltzmann schemes
Computers & Mathematics with Applications
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In this paper we investigate the numerous possible parameter choices for linear lattice Boltzmann schemes according to the definition of the order of isotropy given in Augier et al. (in press) [4]. This property-written in a general framework that includes all of the D"dQ"q schemes-can be understood through a group operation. The resulting relationships between the parameters of the scheme (defining the equilibrium states and relaxation times) yield a rigorous methodology that should be followed if one is to ensure isotropy at a given order. For acoustic applications in two spacial dimensions (namely D"2Q"9 and D"2Q"1"3 schemes) this methodology is used to propose a full description of the sets of parameters that are isotropic at order m (m@?{1,2,3,4,5} for D"2Q"9 and m@?{1,2} for D"2Q"1"3). We include numerical illustrations for the D"2Q"9 scheme obtained with the code LBMpy developed in the laboratory of Mathematics of the University Paris-Sud.