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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.