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Article Dans Une Revue Physical Review Research Année : 2023

Microscopic foundation of the $\mu$(I) rheology for dense granular flows on inclined planes.

Haggai Bonneau
Thomas Salez
Elie Raphaël
Pascal Damman

Résumé

Macroscopic and microscopic properties of dense granular layers flowing down inclined planes are obtained from Discrete-Element-Method simulations for both frictionless and frictional grains. Three fundamental observations for dense granular flows are recovered, namely the occurrence of a critical stress, the Bagnold velocity profile, as well as well-defined friction and dilatancy laws. The microscopic aspects of the grain motion highlight the formation of transient clusters. From this microscopic picture, we derive a theoretical scaling model without any empirical input that explains quantitatively the fundamental laws of dense granular flows in incline plane and shear geometries. The adequacy between the model and the observed results suggests that granular flows can be viewed as flows from thermal fluids of hard spheres.
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Dates et versions

hal-03696161 , version 1 (23-06-2022)
hal-03696161 , version 2 (30-09-2022)

Identifiants

Citer

Denis Dumont, Haggai Bonneau, Thomas Salez, Elie Raphaël, Pascal Damman. Microscopic foundation of the $\mu$(I) rheology for dense granular flows on inclined planes.. Physical Review Research, 2023, 5 (1), pp.013089. ⟨10.1103/PhysRevResearch.5.013089⟩. ⟨hal-03696161v2⟩
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