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Article Dans Une Revue EPL - Europhysics Letters Année : 2009

Heterogeneous dynamics of a granular pack under vertical tapping

Résumé

The dynamics of a tri-dimensional dense granular packing under gravity and vertical tapping is numerically investigated in a stationary state. A slowing-down of the dynamics is observed close to the bottom of the packing with a correlation length of 5-6d. In this perturbed zone, the self-intermediate scattering function, decaying slower than exponentially, suggests the existence of a heterogeneous dynamics. A characteristic time scale of the dynamics depending on the distance from the bottom of the packing is extracted. Our numerical results open the way to a systematic study of the influence of external driving force and of boundary conditions on the heterogeneity of the dynamics of granular packings under gravity.
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Dates et versions

hal-00664712 , version 1 (31-01-2012)

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Sébastien Kiesgen de Richter, Gérard Le Caër, Renaud Delannay. Heterogeneous dynamics of a granular pack under vertical tapping. EPL - Europhysics Letters, 2009, 85 (5), pp.58004. ⟨10.1209/0295-5075/85/58004⟩. ⟨hal-00664712⟩
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