SIZE SEGREGATION IN A 2-DIMENSIONAL SANDPILE - CONVECTION AND ARCHING EFFECTS

被引：96
作者：
DURAN, J
MAZOZI, T
CLEMENT, E
RAJCHENBACH, J
机构：
[1] Acoustique et Optique de la Matière Condensée, CNRS URA 800, Université Pierre et Marie Curie, F-75252, Paris Cedex 05
来源：
PHYSICAL REVIEW E | 1994年 / 50卷 / 06期
关键词：
D O I：
10.1103/PhysRevE.50.5138
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 report an experimental study of the ascent of a large disk imbedded in a two-dimensional packing of small beads vertically vibrated. Two distinct mechanisms leading to size segregation are observed in situ. At high acceleration, the convection process associated with surface trapping is dominant. At low acceleration, we examine the effect of the size ratio on the dynamics of the segregation which is due to successive formation and destruction of arches. © 1994 The American Physical Society.
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页码：5138 / 5141
页数：4
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