DENSITY WAVES AND 1/F DENSITY-FLUCTUATIONS IN GRANULAR FLOW

被引:55
作者
PENG, GW [1 ]
HERRMANN, HJ [1 ]
机构
[1] ACAD SINICA, INST PHYS, BEIJING 100080, PEOPLES R CHINA
来源
PHYSICAL REVIEW E | 1995年 / 51卷 / 03期
关键词
D O I
10.1103/PhysRevE.51.1745
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
We simulate granular flow in a narrow pipe with a lattice-gas automaton model. We find that the density in the system is characterized by two features. One is that spontaneous density waves propagate through the system with well-defined shapes and velocities. The other is that density waves are distributed so as to make the power spectra of density fluctuations vary as 1/fα noise. Three important parameters make these features observable; they are energy dissipation, average density, and the roughness of the pipe walls. © 1995 The American Physical Society.
引用
收藏
页码:1745 / 1756
页数:12
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