article · 17/11/2010
Dynamical facilitation decreases when approaching the granular glass transition
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Résumé
We investigate the relaxation dynamics of a dense monolayer of bidisperse beads by analyzing the experimental data previously obtained in a fluidized bed. We demonstrate that dynamical facilitation becomes less conserved and plays a lesser role for the structural relaxation when approaching the glass transition. We first show that the dynamics obeys the same elementary processes as those previously reported in a cyclic shear experiment: cage jumps aggregate on a very short time into clusters. We then show that increasing the packing fraction makes the spatio-temporal organization of these clusters evolve from a rather scattered and random distribution towards a collection of sparse and finite avalanche events. Copyright (C) EPLA, 2010
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Candelier, R., Dauchot, O., & Biroli, G. (2010). Dynamical facilitation decreases when approaching the granular glass transition. Europhysics Letters, 92(2). https://doi.org/10.1209/0295-5075/92/24003@article{Candelier2010_9,
author = {Candelier, R. and Dauchot, O. and Biroli, G.},
year = {2010},
month = {11},
title = {Dynamical facilitation decreases when approaching the granular glass transition},
journal = {Europhysics Letters},
publisher = {EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY},
volume = {92},
number = {2},
address = {6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE},
abstract = {We investigate the relaxation dynamics of a dense monolayer of bidisperse beads by analyzing the experimental data previously obtained in a fluidized bed. We demonstrate that dynamical facilitation becomes less conserved and plays a lesser role for the structural relaxation when approaching the glass transition. We first show that the dynamics obeys the same elementary processes as those previously reported in a cyclic shear experiment: cage jumps aggregate on a very short time into clusters. We then show that increasing the packing fraction makes the spatio-temporal organization of these clusters evolve from a rather scattered and random distribution towards a collection of sparse and finite avalanche events. Copyright (C) EPLA, 2010},
url = {http://www.dx.doi.org/10.1209/0295-5075/92/24003},
doi = {10.1209/0295-5075/92/24003},
issn = {0295-5075},
}TY - JOUR
AU - Candelier, R.
AU - Dauchot, O.
AU - Biroli, G.
PY - 2010
DA - 2010/11/17
TI - Dynamical facilitation decreases when approaching the granular glass transition
JO - Europhysics Letters
VL - 92
IS - 2
PB - EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
SN - 0295-5075
AB - We investigate the relaxation dynamics of a dense monolayer of bidisperse beads by analyzing the experimental data previously obtained in a fluidized bed. We demonstrate that dynamical facilitation becomes less conserved and plays a lesser role for the structural relaxation when approaching the glass transition. We first show that the dynamics obeys the same elementary processes as those previously reported in a cyclic shear experiment: cage jumps aggregate on a very short time into clusters. We then show that increasing the packing fraction makes the spatio-temporal organization of these clusters evolve from a rather scattered and random distribution towards a collection of sparse and finite avalanche events. Copyright (C) EPLA, 2010
DO - 10.1209/0295-5075/92/24003
UR - http://www.dx.doi.org/10.1209/0295-5075/92/24003
ER -