Initiation of granular surface flows in a narrow channel

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We experimentally investigate how a long granular pile confined in a narrow channel destabilizes when it is inclined above the angle of repose. A uniform flow then develops, which is localized at the free surface. It first accelerates before reaching a steady uniform regime. During this process, an apparent erosion is observed and the thickness of the flowing layer increases. We precisely study the evolution of the vertical velocity profile in this transient regime. The measurements are compared with the prediction of a visco-plastic model [P. Jop, Y. Forterre and O. Pouliquen, Nature 441, 727 (2006)]
5 pages, 5 figures, to be published in Physics of Fluids

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/154119

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.2466
 http://arxiv.org/abs/0707.2466
 Physics of Fluids 19 (2007) 088102
 doi:10.1063/1.2753111

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arXiv