article · 27/02/2009
Building Blocks of Dynamical Heterogeneities in Dense Granular Media
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Résumé
We investigate experimentally the connection between short time dynamics and long time dynamical heterogeneities within a dense granular media under cyclic shear. We show that dynamical heterogeneities result from a two time scales process. Short time but already collective events consisting in clustered cage jumps concentrate most of the nonaffine displacements. On larger time scales, such clusters appear aggregated both temporally and spatially in avalanches which eventually build the large scales dynamical heterogeneities. Our results indicate that facilitation plays an important role in the relaxation process although it does not appear to be conserved as proposed in many models studied in the literature.
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Candelier, R., Dauchot, O., & Biroli, G. (2009). Building Blocks of Dynamical Heterogeneities in Dense Granular Media. Physical Review Letters, 102(8). https://doi.org/10.1103/PhysRevLett.102.088001@article{Candelier2009_14,
author = {Candelier, R. and Dauchot, O. and Biroli, G.},
year = {2009},
month = {2},
title = {Building Blocks of Dynamical Heterogeneities in Dense Granular Media},
journal = {Physical Review Letters},
publisher = {AMER PHYSICAL SOC},
volume = {102},
number = {8},
address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA},
abstract = {We investigate experimentally the connection between short time dynamics and long time dynamical heterogeneities within a dense granular media under cyclic shear. We show that dynamical heterogeneities result from a two time scales process. Short time but already collective events consisting in clustered cage jumps concentrate most of the nonaffine displacements. On larger time scales, such clusters appear aggregated both temporally and spatially in avalanches which eventually build the large scales dynamical heterogeneities. Our results indicate that facilitation plays an important role in the relaxation process although it does not appear to be conserved as proposed in many models studied in the literature.},
url = {http://www.dx.doi.org/10.1103/PhysRevLett.102.088001},
doi = {10.1103/PhysRevLett.102.088001},
issn = {0031-9007},
}TY - JOUR
AU - Candelier, R.
AU - Dauchot, O.
AU - Biroli, G.
PY - 2009
DA - 2009/02/27
TI - Building Blocks of Dynamical Heterogeneities in Dense Granular Media
JO - Physical Review Letters
VL - 102
IS - 8
PB - AMER PHYSICAL SOC
SN - 0031-9007
AB - We investigate experimentally the connection between short time dynamics and long time dynamical heterogeneities within a dense granular media under cyclic shear. We show that dynamical heterogeneities result from a two time scales process. Short time but already collective events consisting in clustered cage jumps concentrate most of the nonaffine displacements. On larger time scales, such clusters appear aggregated both temporally and spatially in avalanches which eventually build the large scales dynamical heterogeneities. Our results indicate that facilitation plays an important role in the relaxation process although it does not appear to be conserved as proposed in many models studied in the literature.
DO - 10.1103/PhysRevLett.102.088001
UR - http://www.dx.doi.org/10.1103/PhysRevLett.102.088001
ER -