Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2005-04-25
Physics
Condensed Matter
Soft Condensed Matter
4 pages, 6 figures, to appear in the proceedings of Powders and Grains 2005
Scientific paper
We study the compaction and mobility properties of a dense granular material under weak random vibration. By putting in direct contact millimetric glass beads with piezoelectric transducers we manage to inject energy to the system in a disordered manner with accelerations much smaller than gravity, resulting in a slow compaction dynamics and no convection. We characterize the mobility inside the medium by pulling through it an intruder grain at constant velocity. We present an extensive study of the relation between drag force and velocity for different vibration conditions and sizes of the intruder.
Caballero G.
Clément Emmanuelle
Lanuza Jose
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