Granular Pressure and the Thickness of a Layer Jamming on a Rough Incline

Details Granular Pressure and the Thickness of a Layer Jamming on a Rough Incline Granular Pressure and the Thickness of a Layer Jamming on a Rough Incline

2005-06-06

arxiv.org/abs/cond-mat/0506155v1

Physics

Condensed Matter

Materials Science

10 pages, 2 figures

Scientific paper

10.1209/epl/i2005-10398-1

Dense granular media have a compaction between the random loose and random close packings. For these dense media the concept of a granular pressure depending on compaction is not unanimously accepted because they are often in a "frozen" state which prevents them to explore all their possible microstates, a necessary condition for defining a pressure and a compressibility unambiguously. While periodic tapping or cyclic fluidization have already being used for that exploration, we here suggest that a succession of flowing states with velocities slowly decreasing down to zero can also be used for that purpose. And we propose to deduce the pressure in \emph{dense and flowing} granular media from experiments measuring the thickness of the granular layer that remains on a rough incline just after the flow has stopped.

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