2002/09/03 by S. Courrech du Pont, Sylvain Courrech du Pont, Philippe Gondret +5 · 2 citations
Engineering · Environmental Science · Physics and Astronomy · #Amplitude #Classical mechanics #Granular flow and fluidized beds #Inertia #Inertial frame of reference #Landslides and related hazards #Mechanics #Particle Dynamics in Fluid Flows #Physics #Quantum mechanics #Thermodynamics #Viscous liquid #cond-mat.soft
paper · pdf · doi:10.1103/physrevlett.90.044301
arxiv created 2002/09/03 · openalex publication_date 2003/01/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Three regimes of granular avalanches in fluids are put in light depending on the Stokes number St which prescribes the relative importance of grain inertia and fluid viscous effects and on the grain/fluid density ratio r. In gas (r>>1 and St>1, e.g., the dry case), the amplitude and time duration of avalanches do not depend on any fluid effect. In liquids (r approximately 1), for decreasing St, the amplitude decreases and the time duration increases, exploring an inertial regime and a viscous regime. These three regimes are described by the analysis of the elementary motion of one grain.