Analysis by x-ray microtomography of a granular packing undergoing compaction

Details Analysis by x-ray microtomography of a granular packing undergoing compaction Analysis by x-ray microtomography of a granular packing undergoing compaction

2003-08-19

arxiv.org/abs/cond-mat/0308367v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures. Latex (revtex4). to be published in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.68.020301

Several acquisitions of X-ray microtomography have been performed on a beads packing while it compacts under vertical vibrations. An image analysis allows to study the evolution of the packing structure during its progressive densification. In particular, the volume distribution of the pores reveals a large tail, compatible to an exponential law, which slowly reduces as the system gets more compact. This is quite consistent, for large pores, with the free volume theory. These results are also in very good agreement with those obtained by a previous numerical model of granular compaction.

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