• DOI:10.1103/PhysRevE.86.031301
• Corpus ID: 45390179

Flow-induced shear instabilities of cohesive granulates.

@article{Battiato2011FlowinducedSI,
  title={Flow-induced shear instabilities of cohesive granulates.},
  author={Ilenia Battiato and J{\"u}rgen Vollmer},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2011},
  volume={86 3 Pt 1},
  pages={
          031301
        }
}

• I. Battiato, J. Vollmer
• Published 13 May 2011
• Physics
• Physical review. E, Statistical, nonlinear, and soft matter physics

In this work we use a multiscale framework to calculate the fluidization threshold of three-dimensional cohesive granulates under shear forces exerted by a creeping flow. A continuum model of flow through porous media provides an analytical expression for the average drag force on a single grain. The balance equation for the forces and a force propagation model are then used to investigate the effects of porosity and packing structure on the stability of the pile. We obtain a closed-form expression for the instability threshold of a regular packing of monodisperse frictionless cohesive spherical grains in a planar fracture. Our result quantifies the compound effect of structural (packing orientation and porosity) and dynamical properties of the system on its stability.