2008/09/16 by Pierre Rognon, Rognon, Pierre, Cyprien Gay +1
Engineering · Environmental Science · #Classical Physics (physics.class-ph) #FOS: Physical sciences #Granular flow and fluidized beds #Landslides and related hazards #Soft Condensed Matter (cond-mat.soft) #Tunneling and Rock Mechanics
paper · pdf · doi:10.48550/arxiv.0809.2649
openalex publication_date 2008/09/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A scalar constitutive law is obtained for dense granular flows, both in the inertial regime where the grain inertia dominates, and in the viscous regime. Considering a pair of grains rather than a single grain, the classical arguments yield a constitutive law that exhibits a flow threshold expressed as a finite effective friction at flow onset. The value of the threshold is not predicted. The resulting law seems to be compatible with existing data, provided the saturation at high velocity (collisional regime) is added empirically. The law is not exactly the same in both regimes, which seems to indicate that there is no "universal" law.