Article Dans Une Revue Physical Review Letters Année : 2022

Viscous to Inertial Transition in Dense Granular Suspension

Résumé

Granular suspensions present a transition from a Newtonian rheology in the Stokes limit to a Bagnoldian rheology when inertia is increased. A custom rheometer that can be run in a pressure-or a volume-imposed mode is used to examine this transition in the dense regime close to jamming. By varying systematically the interstitial fluid, shear rate, and packing fraction in volume-imposed measurements, we show that the transition takes place at a Stokes number of 10 independent of the packing fraction. Using pressureimposed rheometry, we investigate whether the inertial and viscous regimes can be unified as a function of a single dimensionless number based on stress additivity.

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hal-03818789 , version 1 (18-10-2022)

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Franco Tapia, Mie Ichihara, Olivier Pouliquen, Élisabeth Guazzelli. Viscous to Inertial Transition in Dense Granular Suspension. Physical Review Letters, 2022, 129, ⟨10.1103/physrevlett.129.078001⟩. ⟨hal-03818789⟩
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