TY - JOUR
T1 - Phase transitions in shear-induced segregation of granular materials
AU - Fan, Yi
AU - Hill, Kimberly M
PY - 2011/5/27
Y1 - 2011/5/27
N2 - We computationally study shear-induced segregation of different-sized particles in vertical chute flow. We find that, for low solid fractions, large particles segregate toward regions of low shear rates where the granular temperature (velocity variance) is low. As the solid fraction increases, this trend reverses, and large particles segregate toward regions of high shear rates and temperatures. We find that this is a global phenomenon: local segregation trends reverse at high system solid fractions even where local solid fractions are small. The reversal corresponds to the growth of a single enduring cluster of 30%-60% of the particles that we propose changes the segregation dynamics.
AB - We computationally study shear-induced segregation of different-sized particles in vertical chute flow. We find that, for low solid fractions, large particles segregate toward regions of low shear rates where the granular temperature (velocity variance) is low. As the solid fraction increases, this trend reverses, and large particles segregate toward regions of high shear rates and temperatures. We find that this is a global phenomenon: local segregation trends reverse at high system solid fractions even where local solid fractions are small. The reversal corresponds to the growth of a single enduring cluster of 30%-60% of the particles that we propose changes the segregation dynamics.
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U2 - 10.1103/PhysRevLett.106.218301
DO - 10.1103/PhysRevLett.106.218301
M3 - Article
C2 - 21699345
AN - SCOPUS:79960640486
SN - 0031-9007
VL - 106
JO - Physical review letters
JF - Physical review letters
IS - 21
M1 - 218301
ER -