Issue |
EPL
Volume 92, Number 2, October 2010
|
|
---|---|---|
Article Number | 24003 | |
Number of page(s) | 6 | |
Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
DOI | https://doi.org/10.1209/0295-5075/92/24003 | |
Published online | 17 November 2010 |
Dynamical facilitation decreases when approaching the granular glass transition
1
SPEC, CEA-Saclay, URA 2464 CNRS - F-91191 Gif-sur-Yvette, France, EU
2
Institut de Physique Théorique, CEA, IPhT - F-91191 Gif-sur-Yvette, France, EU
3
CNRS, URA 2306 - F-91191 Gif-sur-Yvette, France, EU
Received:
1
July
2010
Accepted:
6
October
2010
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.
PACS: 45.70.Mg – Granular flow: mixing, segregation and stratification / 45.70.Ht – Avalanches / 61.43.-j – Disordered solids
© EPLA, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.