Universal scaling dynamics in a perturbed granular gas

被引：18
|
作者：
Jabeen, Zahera [1 ]
Rajesh, R. [1 ]
Ray, Purusattam [1 ]
机构：
[1] Inst Math Sci, Madras 600113, Tamil Nadu, India
来源：
EPL | 2010年 / 89卷 / 03期
关键词：
INELASTIC COLLAPSE; BEHAVIOR; MEDIA;
D O I：
10.1209/0295-5075/89/34001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the response of a granular system at rest to an instantaneous input of energy in a localised region. We present scaling arguments that show that, in d dimensions, the radius of the resulting disturbance increases with time t as t(alpha), and the energy decreases as t(-alpha d), where the exponent alpha = 1/(d + 1) is independent of the coefficient of restitution. We support our arguments with an exact calculation in one dimension and event-driven molecular-dynamics simulations of hard-sphere particles in two and three dimensions. Copyright (C) EPLA, 2010
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页数：5
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