| Issue |
EPJ Web Conf.
Volume 140, 2017
Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 08001 | |
| Number of page(s) | 4 | |
| Section | Cohesive granular materials | |
| DOI | https://doi.org/10.1051/epjconf/201714008001 | |
| Published online | 30 June 2017 | |
https://doi.org/10.1051/epjconf/201714008001
Granular compaction and stretched exponentials - Experiments and a numerical stochastic model
1 Aix Marseille Univ, CNRS, IUSTI, Marseille, France
2 CEA, DEN, DEC, SFER, LCU, 13108 Saint-Paul-Lez-Durance, France
* e-mail: maxime.nicolas@univ-amu.fr
** e-mail: jean.eric.mathonnet@gmail.com
*** e-mail: blanche.dalloz@univ-amu.fr
**** e-mail: philippe.sornay@cea.fr
Published online: 30 June 2017
We present a stochastic model to investigate the compaction kinetics of a granular material submitted to vibration. The model is compared to experimental results obtained with glass beads and with a cohesive powder. We also propose a physical interpretation of the characteristic time τ and the exponent β of the stretched exponential function widely used to represent the granular compaction kinetics, and we show that the characteristic time is proportional to the number of grains to move. The exponent β is expressed as a logarithmic compaction rate.
© The Authors, published by EDP Sciences, 2017
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