| Issue |
EPL
Volume 84, Number 4, November 2008
|
|
|---|---|---|
| Article Number | 44001 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/84/44001 | |
| Published online | 11 November 2008 | |
Energetic approach for the characterization of taps in granular compaction
GRASP, Physics Department B5, University of Liège - B-4000 Liège, Belgium, EU
Corresponding author: f.ludewig@ulg.ac.be
Received:
27
June
2008
Accepted:
7
October
2008
We report numerical investigations for the compaction dynamics
of dense granular assemblies. The studies are based on the non-smooth contact
dynamics model. Our work suggests that the dimensionless acceleration parameter
, used by a large majority of
authors, is not appropriate for rescaling the data. We prove that the dimensionless energy
, injected in the granular system at
lift-off, is more appropriate and leads to robust interpretations of the compaction dynamics.
Indeed, the injected energy allows to pass energy barriers that separate local equilibrium
states. Using the Eyring picture of relaxation dynamics, we show that the consideration of
leads to a new law for compaction.
PACS: 45.70.-n – Granular systems / 45.70.Cc – Static sandpiles; granular compaction / 75.40.Mg – Numerical simulation studies
© EPLA, 2008
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