title: Unifying suspension and granular rheology.
abstract: Using an original pressure-imposed shear cell, we study the rheology of dense suspensions. We show that they exhibit a viscoplastic behavior similarly to granular media successfully described by a frictional rheology and fully characterized by the evolution of the friction coefficient μ and the volume fraction ϕ with a dimensionless viscous number I(v). Dense suspension and granular media are thus unified under a common framework. These results are shown to be compatible with classical empirical models of suspension rheology and provide a clear determination of constitutive laws close to the jamming transition.
authors: IUSTI, Aix-Marseille Université, CNRS, UMR 6595, 5 rue E Fermi, 13453 Marseille cedex 13, France. francois.boyer@polytech.univ-mrs.fr
authors: François
authors: F
authors: Boyer
authors: Élisabeth
authors: É
authors: Guazzelli
authors: Olivier
authors: O
authors: Pouliquen
mesh_terms: D017276:Friction; D012212:Rheology; D013314:Stress, Mechanical; D013535:Suspensions / Q000737:chemistry*; D014783:Viscosity
chemical_list: D013535:Suspensions