EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Cohesive granular materials|
|Published online||30 June 2017|
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
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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