Flow-induced shear instabilities of cohesive granulates.

  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},
  volume={86 3 Pt 1},
  • I. BattiatoJ. 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… 

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