Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-02-09
Rheologica Acta 48, 8 (2009) 831-844
Physics
Condensed Matter
Soft Condensed Matter
The original publication is available at http://www.springerlink.com
Scientific paper
10.1007/s00397-008-0344-6
We review and compare the phenomenological aspects and physical origin of shear-localization and shear-banding in various material types, namely emulsions, suspensions, colloids, granular materials and micellar systems. It appears that shear-banding, which must be distinguished from the simple effect of coexisting static-flowing regions in yield stress fluids, occurs in the form of a progressive evolution of the local viscosity towards two significantly different values in two adjoining regions of the fluids in which the stress takes slightly different values. This suggests that from a global point of view shear-banding in these systems has a common physical origin: two physical phenomena (for example, in colloids, destructuration due to flow and restructuration due to aging) are in competition and, depending on the flow conditions, one of them becomes dominant and makes the system evolve in a specific direction.
Chateau Xavier
Coussot Philippe
Ovarlez Guillaume
Rodts Stéphane
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