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Downslope granular flow through a forest of obstacles

Baptiste Darbois Texier, Yann Bertho, and Philippe Gondret
Phys. Rev. Fluids 8, 034303 – Published 31 March 2023

Abstract

We investigate the effect of a forest of pillars on a granular layer steadily flowing over a rough inclined plane. We quantify experimentally how the steady flow rate of grains is affected by the interpillars distance for different layer thicknesses and slope angles. We then propose a model based on a depth-average approximation associated with μ(I) rheology that considers the additional force exerted by the pillars on the granular layer. This model succeeds in accounting for most of the observed results when taking into account some inertia due to the nonvanishing Froude number of the flow.

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  • Received 13 April 2022
  • Accepted 8 February 2023

DOI:https://doi.org/10.1103/PhysRevFluids.8.034303

©2023 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Baptiste Darbois Texier, Yann Bertho, and Philippe Gondret

  • Université Paris-Saclay, CNRS, FAST, 91405, Orsay, France

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Issue

Vol. 8, Iss. 3 — March 2023

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