Granular Matter

, 10:353

First online:

Granular flows down inclined channels with a strain-rate dependent friction coefficient. Part I: Non-cohesive materials

  • Alain de RyckAffiliated withÉcole des Mines d’Albi, UMR CNRS 2392 Email author 
  • , Renaud AnsartAffiliated withÉcole des Mines d’Albi, UMR CNRS 2392
  • , John A. DoddsAffiliated withÉcole des Mines d’Albi, UMR CNRS 2392

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The flow of a granular material down an incline of finite width with a strain-rate dependent coefficient of friction and a conical yield criterion is semi-analytically obtained using a characteristic method for flows on a deep layer of grains. This analysis leads to a flow field with three distinct zones: a Bagnold-flow zone below the free surface, a dead-zone and a matching zone between the two, linked to slippage at the wall. A good agreement between the computed flow field and experimental data is obtained.


Granular materials Surface flows