Importance of convection in the compaction mechanisms of anisotropic granular media

Details Importance of convection in the compaction mechanisms of anisotropic granular media Importance of convection in the compaction mechanisms of anisotropic granular media

2005-01-11

arxiv.org/abs/cond-mat/0501268v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevE.71.011304

We report the experimental observation of novel vortex patterns in a vertically tapped granular media. Depending on the tapping acceleration two behaviors are observed. For high acceleration a convection vortex appears in the whole media whereas for low acceleration two unstable vortices appear in the upper part of the media and slowly compact the lower part. We explain the formation of the vortices and relate them to granular convection. Our results demonstrate the importance of compression waves propagation on granular compaction.

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