2012/01/27 by Sebastian Chialvo, Jin Sun, Sankaran Sundaresan · 1 citation
Engineering · Environmental Science · Materials Science · Physics and Astronomy · #Granular flow and fluidized beds #Landslides and related hazards #Material Dynamics and Properties #cond-mat.soft
paper · pdf · doi:10.1103/physreve.85.021305
Accepted to Physical Review E
arxiv created 2012/01/27 · openalex publication_date 2012/02/13 · arxiv updated 2012/02/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
We investigate the rheology of granular materials via molecular dynamics simulations of homogeneous, simple shear flows of soft, frictional, noncohesive spheres. In agreement with previous results for frictionless particles, we observe three flow regimes existing in different domains of particle volume fraction and shear rate, with all stress data collapsing upon scaling by powers of the distance to the jamming point. Though this jamming point is a function of the interparticle friction coefficient, the relation between pressure and strain rate at this point is found to be independent of friction. We also propose a rheological model that blends the asymptotic relations in each regime to obtain a general description for these flows. Finally, we show that departure from inertial number scalings is a direct result of particle softness, with a dimensionless shear rate characterizing the transition.