2008/02/19 by Denis S. Grebenkov, Massimo Pica Ciamarra, Mario Nicodemi +1 · 3 citations
Earth and Planetary Sciences · Engineering · Materials Science · Physics and Astronomy · #Granular flow and fluidized beds #High-pressure geophysics and materials #Material Dynamics and Properties #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.100.078001
published as Phys. Rev. Lett. 100, 078001 (2008) · 4 pages
openalex publication_date 2008/02/19 · arxiv created 2008/02/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the rheological properties of a granular suspension subject to constant shear stress by constant volume molecular dynamics simulations. We derive the system "flow diagram" in the volume fraction or stress plane (phi, F): at low phi the flow is disordered, with the viscosity obeying a Bagnold-like scaling only at small F and diverging as the jamming point is approached; if the shear stress is strong enough, at higher phi an ordered flow regime is found, the order-disorder transition being marked by a sharp drop of the viscosity. A broad jamming region is also observed where, in analogy with the glassy region of thermal systems, slow dynamics followed by kinetic arrest occurs when the ordering transition is prevented.