Mechanism of the onset of axial segregation in a rotating cylindrical drum filled with binary granular mixtures

被引：24

作者：

Elperin, T ^{[1
]}

Vikhansky, A ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Dept Mech Engn, Pearlstone Ctr Aeronaut Engn Studies, IL-84105 Beer Sheva, Israel

来源：

PHYSICAL REVIEW E | 1999年 / 60卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.60.1946

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：

A phenomenon of axial band formation in a long rotating cylindrical drum filled with a binary granular mixture is described as a two-stage process. At the first stage, due to different mobility of the large and small particles, a central core occupied by a small-size fraction is formed along the axis of the dmm. The axial segregation, i.e., transverse band formation, is found to be associated with the instability of the radially segregated state caused by an asymmetry of the free surface of the granular material. This instability is caused by the difference in the repose angles of two granular fractions and deviation of the filling level of the drum from 0.5. [S1063-651X(99)04308-1].

引用

页码：1946 / 1950

页数：5

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