Viscoinertial regime of immersed granular flows
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PhysRevE.96.012901.pdf
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1.02 MB
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Author(s)
Amarsid, L.
Delenne, J.-Y.
Monerie, Y.
Perales, F.
Mutabaruka, Patrick
Radjai, Franck
Date Issued
July 2017
Journal
Physical Review E
Publisher
American Physical Society
Citation
Amarsid, L.; Delenne, J.-Y.; Mutabaruka, P.; Monerie, Y.; Perales, F. and Radjai, F. "Viscoinertial regime of immersed granular flows." Physical Review E 96, 012901 (July 2017): 1-7 © 2017 American Physical Society
Version
Final published version
Abstract
By means of extensive coupled molecular dynamics–lattice Boltzmann simulations, accounting for grain dynamics and subparticle resolution of the fluid phase, we analyze steady inertial granular flows sheared by a viscous fluid. We show that, for a broad range of system parameters (shear rate, confining stress, fluid viscosity, and relative fluid-grain density), the frictional strength and packing fraction can be described by a modified inertial number incorporating the fluid effect. In a dual viscous description, the effective viscosity diverges as the inverse square of the difference between the packing fraction and its jamming value, as observed in experiments. We also find that the fabric and force anisotropies extracted from the contact network are well described by the modified inertial number, thus providing clear evidence for the role of these key structural parameters in dense suspensions.
MIT Department
MIT Energy Initiative
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DOI of Published Version
https://doi.org/10.1103/PhysRevE.96.012901
