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8 papers · 2 filters
Wide-gap Couette flows of dense emulsions: Local concentration measurements, and comparison between macroscopic and local constitutive law measurements through magnetic resonance imaging
Guillaume Ovarlez, Stéphane Rodts, Alexandre Ragouilliaux +3
Flows of dense emulsions show many complex features among which long range nonlocal effects pose a problem for macroscopic characterization. In order to get around this problem, we…
Influence of shear stress applied during flow stoppage and rest period on the mechanical properties of thixotropic suspensions
Guillaume Ovarlez, Xavier Chateau
We study the solid mechanical properties of several thixotropic suspensions as a function of the shear stress history applied during their flow stoppage and their aging in their so…
Dense granular flows: interpolating between grain inertia and fluid viscosity based constitutive laws
Pierre Rognon, Cyprien Gay
A scalar constitutive law was recently obtained for dense granular flows from a two-grain argument, both in the inertial regime (grain inertia) and in the viscous regime. As the re…
Dense granular flows: two-particle argument accounts for friction-like constitutive law with threshold
Pierre Rognon, Cyprien Gay
A scalar constitutive law is obtained for dense granular flows, both in the inertial regime where the grain inertia dominates, and in the viscous regime. Considering a pair of grai…
Measurements of the aeolian sand transport saturation length
B. Andreotti, P. Claudin, O. Pouliquen
The wavelength at which a dune pattern emerges from a flat sand bed is controlled by the sediment transport saturation length, which is the length needed for the sand flux to adapt…
Experimental evidence of non-Amontons behaviour at a multicontact interface
Julien Scheibert, Alexis Prevost, Joel Frelat +2
We report on normal stress field measurements at the multicontact interface between a rough elastomeric film and a smooth glass sphere under normal load, using an original MEMS-bas…