Experiments in randomly agitated granular assemblies close to the jamming transition
arXiv:cond-mat/0403604 · doi:10.1088/0953-8984/17/24/009
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.
Contribution to the volume "Unifying Concepts in Granular Media and Glasses", edt.s A. Coniglio, A. Fierro, H.J. Herrmann and M. Nicodemi
References in corpus (13)
- Footprints in Sand: The Response of a Granular Material to Local Perturbations
- Compaction dynamics of a granular media under vertical tapping
- Edwards measures for powders and glasses
- Memory Effects in Granular Material
- Granular Drag on a Discrete Object: Shape Effects on Jamming
- Edwards' measures: a thermodynamic construction for dense granular media and glasses
- Fluctuating particle motion during shear induced granular compaction
- Green's function probe of a static granular piling
- Intermittency of glassy relaxation and the emergence of a non-equilibrium spontaneous measure in the aging regime
- Phase Transitions in Granular Packings
- Reorganization of a dense granular assembly: the `unjamming response function'
- Thermodynamics and statistical mechanics of frozen systems in inherent states
- Contact dynamics in a gently vibrated granular pile