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Experiments in randomly agitated granular assemblies close to the jamming transition

G. Caballero·A. Lindner·G. Ovarlez·G. Reydellet·J. Lanuza·E. Clement
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Abstract

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.

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G. Caballero, A. Lindner, G. Ovarlez, G. Reydellet, J. Lanuza, E. Clement. 2004-03-24. Experiments in randomly agitated granular assemblies close to the jamming transition. https://doi.org/10.1088/0953-8984%2F17%2F24%2F009

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