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Pré-Publication, Document De Travail Année : 2004

Experiments in randomly agitated granular assemblies close to the jamming transition

Résumé

We present here the preliminary results obtained for two experiments on randomly agitated granular assemblies using a novel way of shaking. First we discuss the transport properties of a 2D model system undergoing classical shaking that show the importance of large scale dynamics for this type of agitation and offer a local view of the microscopic motions of a grain. We then develop a new way of vibrating the system allowing for random accelerations smaller than gravity. Using this method we study the evolution of the free surface as well as results from a light scattering method for a 3D model system. The final aim of these experiments is to investigate the ideas of effective temperature on the one hand as a function of inherent states and on the other hand using fluctuation dissipation relations.

Dates et versions

hal-00116353 , version 1 (26-11-2006)

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G. Caballero, A. Lindner, Guillaume Ovarlez, G. Reydellet, J. Lanuza, et al.. Experiments in randomly agitated granular assemblies close to the jamming transition. 2004. ⟨hal-00116353⟩
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