Validity of the Boltzmann equation to describe low-density granular systems

被引：17
|
作者：
Brey, JJ [1 ]
Ruiz-Montero, MJ [1 ]
机构：
[1] Univ Seville, E-41080 Seville, Spain
来源：
PHYSICAL REVIEW E | 2004年 / 69卷 / 01期
关键词：
D O I：
10.1103/PhysRevE.69.011305
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The departure of a granular gas in the instable region of parameters from the initial homogeneous cooling state is studied. Results from molecular dynamics and from direct Monte Carlo simulation of the Boltzmann equation are compared. The results indicate that the Boltzmann equation accurately predicts the low-density limit of the system. The relevant role played by the parallelization of the velocities as time proceeds and the dependence of this effect on the density is analyzed in detail.
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页数：9
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