Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-06-09
Physical Review Letters 105 (2010) 268303
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1103/PhysRevLett.105.268303
We study the emergence of shear thickening in dense suspensions of non-Brownian particles. We combine local velocity and concentration measurements using Magnetic Resonance Imaging with macroscopic rheometry experiments. In steady state, we observe that the material is heterogeneous, and we find that that the local rheology presents a continuous transition at low shear rate from a viscous to a shear thickening, Bagnoldian, behavior with shear stresses proportional to the shear rate squared, as predicted by a scaling analysis. We show that the heterogeneity results from an unexpectedly fast migration of grains, which we attribute to the emergence of the Bagnoldian rheology. The migration process is observed to be accompanied by macroscopic transient discontinuous shear thickening, which is consequently not an intrinsic property of granular suspensions.
Bertrand François
Bonn Daniel
Fall Abdoulaye
Lemaître Anaël
Ovarlez Guillaume
No associations
LandOfFree
Shear thickening and migration in granular suspensions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Shear thickening and migration in granular suspensions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shear thickening and migration in granular suspensions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-39835