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

Alain de Ryck (1) , Renaud Ansart (1) , John A. Dodds (1)

1 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

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.

Mots clés: Surface flows; Granular materials

Domaines: Génie des procédés; Matériaux

Alain de Ryck, Renaud Ansart, John A. Dodds. Granular flows down inclined channels with a strain-rate dependent friction coefficient. Part I: Non-cohesive materials. Granular Matter, 2008, vol. 10, pp. 353-360. ⟨10.1007/s10035-008-0105-3⟩. ⟨hal-00740926⟩