TY - JOUR
T1 - Stratification, segregation, and mixing of granular materials in quasi-two-dimensional bounded heaps
AU - Fan, Yi
AU - Boukerkour, Youcef
AU - Blanc, Thibault
AU - Umbanhowar, Paul B.
AU - Ottino, Julio M.
AU - Lueptow, Richard M.
PY - 2012/11/29
Y1 - 2012/11/29
N2 - Segregation and mixing of granular mixtures during heap formation has important consequences in industry and agriculture. This research investigates three different final particle configurations of bidisperse granular mixtures-stratified, segregated and mixed-during filling of quasi-two- dimensional silos. We consider a large number and wide range of control parameters, including particle size ratio, flow rate, system size, and heap rise velocity. The boundary between stratified and unstratified states is primarily controlled by the two-dimensional flow rate, with the critical flow rate for the transition depending weakly on particle size ratio and flowing layer length. In contrast, the transition from segregated to mixed states is controlled by the rise velocity of the heap, a control parameter not previously considered. The critical rise velocity for the transition depends strongly on the particle size ratio.
AB - Segregation and mixing of granular mixtures during heap formation has important consequences in industry and agriculture. This research investigates three different final particle configurations of bidisperse granular mixtures-stratified, segregated and mixed-during filling of quasi-two- dimensional silos. We consider a large number and wide range of control parameters, including particle size ratio, flow rate, system size, and heap rise velocity. The boundary between stratified and unstratified states is primarily controlled by the two-dimensional flow rate, with the critical flow rate for the transition depending weakly on particle size ratio and flowing layer length. In contrast, the transition from segregated to mixed states is controlled by the rise velocity of the heap, a control parameter not previously considered. The critical rise velocity for the transition depends strongly on the particle size ratio.
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U2 - 10.1103/PhysRevE.86.051305
DO - 10.1103/PhysRevE.86.051305
M3 - Article
C2 - 23214777
AN - SCOPUS:84870675429
SN - 1539-3755
VL - 86
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 5
M1 - 051305
ER -