Article (Scientific journals)
Energetic approach for the characterization of taps in granular compaction
Ludewig, François; Dorbolo, Stéphane; Gilet, Tristan et al.
2008In Europhysics Letters, 84 (4)
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Abstract :
[en] 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 Gamma, used by a large majortiy of authors, is not appropriate for rescaling the data. We prove that the dimensionless energy Xi, 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 dynamic, we show that the consideration of Xi leads to a new law for compaction.
Disciplines :
Physics
Author, co-author :
Ludewig, François ;  Université de Liège - ULiège > Département de physique > Physique statistique
Dorbolo, Stéphane  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Gilet, Tristan  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Vandewalle, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Language :
English
Title :
Energetic approach for the characterization of taps in granular compaction
Publication date :
2008
Journal title :
Europhysics Letters
ISSN :
0295-5075
eISSN :
1286-4854
Publisher :
EDP Sciences, France
Volume :
84
Issue :
4
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 September 2009

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