Smoothing of sandpile surfaces after intermittent and continuous avalanches: three models in search of an experiment

Details Smoothing of sandpile surfaces after intermittent and continuous avalanches: three models in search of an experiment Smoothing of sandpile surfaces after intermittent and continuous avalanches: three models in search of an experiment

1997-12-06

arxiv.org/abs/cond-mat/9712083v1

Physics

Condensed Matter

Soft Condensed Matter

17 pages and 26 figures. Submitted to Physical Review E

Scientific paper

10.1103/PhysRevE.58.1266

We present and analyse in this paper three models of coupled continuum equations all united by a common theme: the intuitive notion that sandpile surfaces are left smoother by the propagation of avalanches across them. Two of these concern smoothing at the `bare' interface, appropriate to intermittent avalanche flow, while one of them models smoothing at the effective surface defined by a cloud of flowing grains across the `bare' interface, which is appropriate to the regime where avalanches flow continuously across the sandpile.

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