A NONLOCAL MODIFICATION OF A LATTICE BOLTZMANN MODEL

Authors
HAYOT F WAGNER L
Citation
F. Hayot et L. Wagner, A NONLOCAL MODIFICATION OF A LATTICE BOLTZMANN MODEL, Europhysics letters, 33(6), 1996, pp. 435-440
Citations number
13
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
33
Issue
6
Year of publication
1996
Pages
435 - 440
Database
ISI
SICI code
0295-5075(1996)33:6<435:ANMOAL>2.0.ZU;2-R
Abstract
We discuss a non-local modification of the lattice Boltzmann BGK model . The modification involves the mixing of particle configurations over a range of distances. We show that at large distances and large times the modified BGK model entails the presence of an effective viscosity , and is thus similar to the usual closure approximation to the Navier -Stokes equation. We discuss the case of turbulent channel flow.