Velocity fluctuations in a one-dimensional inelastic Maxwell model

被引：10
|
作者：
Costantini, G.
Marconi, U. Marini Bettolo
Puglisi, A.
机构：
[1] Univ Camerino, Dipartimento Fis, INFM, SOFT, I-62032 Camerino, Italy
[2] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
来源：
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2007年
关键词：
driven diffusive systems ( theory); stochastic particle dynamics ( theory); granular matter; nonequilibrium fluctuations in small systems;
D O I：
10.1088/1742-5468/2007/08/P08031
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
We consider the velocity fluctuations of a system of particles described by the inelastic Maxwell model. The present work extends the methods previously employed to obtain the one-particle velocity distribution function to the study of the two-particle correlations. Results regarding both the homogeneous cooling process and the steady state driven regime are presented. In particular we obtain the form of the pair correlation function in the scaling region of the homogeneous cooling process and show that some of its moments diverge. This fact has repercussions for the behavior of the energy fluctuations of the model.
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页数：16
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