Issue
EPL
Volume 81, Number 3, February 2008
Article Number 34005
Number of page(s) 6
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/81/34005
Published online 03 January 2008
EPL, 81 (2008) 34005
DOI: 10.1209/0295-5075/81/34005

Galilean invariance of lattice Boltzmann models

X. B. Nie, X. Shan and H. Chen

Exa Corporation - 3 Burlington Woods Drive, Burlington, MA 01803, USA


received 26 September 2007; accepted in final form 4 December 2007; published February 2008
published online 3 January 2008

Abstract
It is well known that the original lattice Boltzmann (LB) equation deviates from the Navier-Stokes equations due to an unphysical velocity-dependent viscosity. This unphysical dependence violates the Galilean invariance and limits the validation domain of the LB method to near incompressible flows. As previously shown, recovery of correct transport phenomena in kinetic equations depends on the higher hydrodynamic moments. In this letter, we give specific criteria for recovery of various transport coefficients. The Galilean invariance of a general class of LB models is demonstrated via numerical experiments.

PACS
47.11.-j - Computational methods in fluid dynamics.
05.20.Dd - Kinetic theory.
47.40.-x - Compressible flows; shock waves.

© EPLA 2008