Granular packings sheared in an annular channel: Flow localization and grain size dependence

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

Volumn 72, Issue 5, 2005, Pages

  Tsai, J C ^b   Gollub, J P ^a  

^a HAVERFORD COLLEGE   (United States)

^b UNIVERSITY OF PENNSYLVANIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GRANULAR SHEAR FLOWS; HEURISTIC CONTINUUM MODEL;

GLASS; GRANULAR MATERIALS; IMAGING TECHNIQUES; PARTICLE SIZE ANALYSIS; SHEARING;

GRAIN SIZE AND SHAPE;

EID: 28844449326     PISSN: 15393755     EISSN: 15502376     Source Type: Journal    
DOI: 10.1103/PhysRevE.72.051304     Document Type: Article

References (28)

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28. Note that their 2D simulations are performed in a context for which the gravity-induced gradient of normal stress is significant and the upper layers are sufficiently agitated: the imposed normal force is less than the weight of 24 layers of grains with the typical driving speed ranging from 22 to 53(gd)0. 5; the packing thickness is about 102d. In our experiments, the imposed normal stress is more than the weight of 102 layers of grains while the highest driving speed is less than 10-2(gd)0.5; the typical packing is 24 layers thick. The low speed and high normal load in our experiments renders the entire packing quasistatic. The shear banding and the "phase boundary" that occurs in our thick-layer experiments are induced mainly by sidewalls rather than by gravity.