Phenomenology and physical origin of shear-localization and shear-banding in complex fluids - Archive ouverte HAL Access content directly
Journal Articles Rheologica Acta Year : 2009

Phenomenology and physical origin of shear-localization and shear-banding in complex fluids

(1) , (2) , (1) , (3)
1
2
3
Guillaume Ovarlez
Stéphane Rodts
Xavier Chateau
Philippe Coussot
  • Function : Author
  • PersonId : 1101142

Abstract

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.
Fichier principal
Vignette du fichier
Ovarlez_et_al_shear_banding_2009.pdf (395.51 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-00454772 , version 1 (09-02-2010)

Identifiers

Cite

Guillaume Ovarlez, Stéphane Rodts, Xavier Chateau, Philippe Coussot. Phenomenology and physical origin of shear-localization and shear-banding in complex fluids. Rheologica Acta, 2009, 48 (8), pp.831-844. ⟨10.1007/s00397-008-0344-6⟩. ⟨hal-00454772⟩
150 View
241 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More