Factorization symmetry in lattice Boltzmann simulations

Abstract

A non-perturbative algebraic theory of lattice Boltzmann method is developed based on a symmetry of a product. It involves three steps: (i) Derivation of admissible lattices in one spatial dimension through a matching condition which imposes restricted extension of higher-order Gaussian moments, (ii) Special quasi-equilibrium distribution function found analytically in closed form on the product-lattice in two and three spatial dimensions, and which proves factorization of quasi-equilibrium moments, and (iii) Algebraic method of pruning based on a one-into-one relation between groups of discrete velocities and moments. Two routes of constructing lattice Boltzmann equilibria are distinguished. Present theory includes previously known limiting and special cases of lattices, and enables automated derivation of lattice Boltzmann models from two-dimensional tables, by finding roots of one polynomial and solving a few linear systems.

Under consideration in Phys Rev E

References in corpus (3)

• Lattice Boltzmann method for thermal flow simulation on standard lattices
• Galilean invariance of lattice Boltzmann models
• Fundamental Conditions for N-th Order Accurate Lattice Boltzmann Models

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