Constitutive law of dense granular matter

被引：6
|
作者：
Hatano, Takahiro [1 ]
机构：
[1] Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 1130032, Japan
来源：
INTERNATIONAL CONFERENCE ON SCIENCE OF FRICTION 2010 (ICSF2010) | 2010年 / 258卷
关键词：
FLOWS;
D O I：
10.1088/1742-6596/258/1/012006
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
The frictional properties of dense granular matter under steady shear flow are investigated using numerical simulation. Shear flow tends to localize near the driving boundary unless the coefficient of restitution is close to zero and the driving velocity is small. The bulk friction coefficient is independent of shear rate in dense and slow flow, whereas it is an increasing function of shear rate in rapid flow. The coefficient of restitution affects the friction coefficient only in such rapid flow. Contrastingly, in dense and slow regime, the friction coefficient is independent of the coefficient of restitution and mainly determined by the elementary friction coefficient and the rotation of grains. It is found that the mismatch between the vorticity of flow and the angular frequency of grains plays a key role to the frictional properties of sheared granular matter.
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页数：8
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