Flow, Ordering, and Jamming of Sheared Granular Suspensions

Denis S. Grebenkov, Massimo Pica Ciamarra, Mario Nicodemi, and Antonio Coniglio
Phys. Rev. Lett. 100, 078001 – Published 19 February 2008

Abstract

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 (ϕ, F): at low ϕ 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 ϕ 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.

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  • Received 16 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.078001

©2008 American Physical Society

Authors & Affiliations

Denis S. Grebenkov2,3,*, Massimo Pica Ciamarra1,2, Mario Nicodemi2,4, and Antonio Coniglio2

  • 1CNISM and Department of Information Engineering, Second University of Naples, 81031 Aversa (CE), Italy
  • 2Dip.to di Scienze Fisiche, Universitá di Napoli “Federico II” and INFN, Naples, Italy
  • 3LPMC, C.N.R.S.-Ecole Polytechnique, F-91128 Palaiseau, France
  • 4Complexity Science and Department of Physics, University of Warwick, United Kingdom

  • *denis.grebenkov@polytechnique.edu

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Vol. 100, Iss. 7 — 22 February 2008

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