Importance of convection in the compaction mechanisms of anisotropic granular media

Abstract : 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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https://hal.archives-ouvertes.fr/hal-00003870
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Submitted on : Tuesday, January 11, 2005 - 9:52:26 PM
Last modification on : Wednesday, July 17, 2019 - 11:16:02 AM
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Philippe Ribière, Patrick Richard, Renaud Delannay, Daniel Bideau. Importance of convection in the compaction mechanisms of anisotropic granular media. 2005. ⟨hal-00003870⟩

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