Papers
Experimental Study of Granular Compaction Dynamics at Different Scales - 2005
G. Lumay and N. Vandewalle, Phys. Rev. Lett. 95, 028002, July 2005
We present an original experimental study of the compaction dynamics for two-dimensional granular systems. Compaction dynamics is measured at three different scales: the macroscopic scale through the normalized packing fraction ˜ρ, the mesoscopic scale through the normalized fraction of hexagonal domains in the system, and the microscopic scale through the grain mobility µ. Moreover, the hexagonal domains are found to obey a growth process dominated by the displacement of domain boundaries. A global picture of compaction dynamics relevant at each scale is proposed.