Crucial role of sidewalls in granular surface flows : consequences for the rheology

  title={Crucial role of sidewalls in granular surface flows : consequences for the rheology},
  author={By PIERRE JOP and Olivier Pouliquen},
In this paper we study the steady uniform flows that develop when granular material is released from a hopper on top of a static pile in a channel. More specifically, we focus on the role of sidewalls by carrying out experiments in set-up of different widths, from narrow channels 20 particle diameters wide to channels 600 particle diameters wide. Results show that steady flows on pile are entirely controlled by sidewall effects. A theoretical model, taking into account the wall friction and… CONTINUE READING
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