Sedimentation of granular columns in the viscous and weakly inertial regimes

被引：5

作者：

Chraibi, Hamza ^{[1
]}

Amarouchene, Yacine ^{[1
]}

机构：

[1] Univ Bordeaux, Lab Ondes & Matiere Aquitaine, UMR Associee CNRS 5798, F-33400 Talence, France

来源：

PHYSICAL REVIEW E | 2013年 / 88卷 / 04期

关键词：

INSTABILITY; SPEED;

D O I：

10.1103/PhysRevE.88.042204

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 investigate the dynamics of granular columns of point particles that interact via long-range hydrodynamic interactions and fall under the action of gravity. We investigate the influence of inertia using the Green's function for the Oseen equation. The initial conditions (density and aspect ratio) are systematically varied. Our results suggest that universal self-similar laws may be sufficient to characterize the temporal and structural evolution of the granular columns. A characteristic time above which an instability is triggered (which may enable the formation of clusters) is also retrieved and discussed.

引用

页数：4

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