Europhys. Lett.
Volume 48, Number 4, November 1999
Page(s) 359 - 364
Section General
Published online 01 September 2002
DOI: 10.1209/epl/i1999-00490-0

Europhys. Lett, 48 (4), pp. 359-364 (1999)

On the validity of linear hydrodynamics for low-density granular flows described by the Boltzmann equation

J. J. Brey, M. J. Ruiz-Montero and D. Cubero

Física Teórica, Universidad de Sevilla - Apartado de Correos 1065, E-41080 Sevilla, Spain

(received 29 March 1999; accepted in final form 15 September 1999)

PACS. 05.20$\rm -y$ - Classical statistical mechanics.
PACS. 05.20Dd - Kinetic theory.
PACS. 81.05Rm - Porous materials; granular materials.


The direct Monte Carlo simulation method is used to check the validity of the hydrodynamic description of a low-density granular flow in the linear region about the homogeneous cooling state. Good agreement is found between the simulation results and the hydrodynamic equations obtained recently from the Boltzmann equation by using a generalized Chapman-Enskog procedure. In particular, the dependence of the transport coefficients on the coefficient of restitution predicted by the theory is verified.


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