2005/07/07 by F. Malloggi, F Malloggi, J. Lanuza +5 · 2 citations
Engineering · Physics and Astronomy · #Fluid Dynamics and Thin Films #Granular flow and fluidized beds #Particle Dynamics in Fluid Flows #cond-mat.soft
paper · pdf · doi:10.1209/epl/i2006-10174-9
4 pages, 6 figures, submitted to PRL
arxiv created 2005/07/07 · openalex publication_date 2006/07/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Two laboratory scale experiments of dry and underwater avalanches of non-cohesive granular materials are investigated. We trigger solitary waves and study the conditions under which the front is transversally stable. We show the existence of a linear instability followed by a coarsening dynamics and finally the onset of a fingering pattern. Due to the different operating conditions, both experiments strongly differ by the spatial and time scales involved. Nevertheless, the quantitative agreement between the stability diagram, the wavelengths selected and the avalanche morphology suggest a common scenario for an erosion/deposition process.