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Article Dans Une Revue EPJ Web of Conferences Année : 2021

Sidewall friction in confined surface flows of granular materials

Alexandre Valance
Renaud Delannay

Résumé

We report numerical simulations of surface granular flows confined between two sidewalls. These systems exhibit both very slow and very energetic flows. Zhu et al. [1] have shown that in energetic confined systems, the Froude number at sidewalls and the sidewall effective friction coefficient are linked through a unique relation. We show that this relation is also valid for creep flows. It is independent of the angle of the flow but depends on the sidewall-grain friction coefficient. Our results shed light on boundary conditions that have to be used at sidewalls in continuum theories aiming to capture the behavior of granular systems from creeping to energetic flows.
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Dates et versions

hal-03451140 , version 1 (26-11-2021)

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Patrick Richard, Alexandre Valance, Renaud Delannay. Sidewall friction in confined surface flows of granular materials. EPJ Web of Conferences, 2021, 249, pp.03024. ⟨10.1051/epjconf/202124903024⟩. ⟨hal-03451140⟩
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