Erosive granular avalanches: A cross confrontation between theory and experiment

Eric Clément, Florent Malloggi, Bruno Andreotti, Igor Aronson

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Results on two laboratory scale avalanches experiments taking place both in the air and under-water, are presented. In both cases a family of solitary erosion/deposition waves are observed. At higher inclination angles, we show the existence of a long wavelength transverse instability followed by a coarsening and the onset of a fingering pattern. While the experiments strongly differ by the spatial and time scales, the agreement between the stability diagram, the wavelengths selection and the avalanche morphology suggest a common erosion/deposition scenario. These experiments are studied theoretically in the framework of the "partial fluidization" model of dense granular flows. This model identifies a family of propagating solitary waves displaying a behavior similar to the experimental observation. A primary cause for the transverse instability is related to the dependence of avalanche velocity on the granular mass trapped by the flow.

Original languageEnglish (US)
Pages (from-to)3-11
Number of pages9
JournalGranular Matter
Volume10
Issue number1
DOIs
StatePublished - Dec 1 2007

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avalanches
erosion
Erosion
Wavelength
Experiments
Fluidization
Coarsening
Solitons
wavelengths
inclination
solitary waves
diagrams
Water
causes
air
Air
water

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)

Cite this

Clément, Eric ; Malloggi, Florent ; Andreotti, Bruno ; Aronson, Igor. / Erosive granular avalanches : A cross confrontation between theory and experiment. In: Granular Matter. 2007 ; Vol. 10, No. 1. pp. 3-11.
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Erosive granular avalanches : A cross confrontation between theory and experiment. / Clément, Eric; Malloggi, Florent; Andreotti, Bruno; Aronson, Igor.

In: Granular Matter, Vol. 10, No. 1, 01.12.2007, p. 3-11.

Research output: Contribution to journalArticle

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