| Rhéophysique des pâtes et des milieux granulaires |  |
| Rhéophysique des pâtes et des milieux granulaires | |
| HAL: hal-00454772, version 1 |
| arXiv: 1002.1890 |
| DOI: 10.1007/s00397-008-0344-6 |
| Detailed view |  Export this paper |
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| Rheologica Acta 48, 8 (2009) 831-844 |
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| Phenomenology and physical origin of shear-localization and shear-banding in complex fluids |
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| Guillaume Ovarlez 1Stéphane Rodts 1 |
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| (2009) |
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| 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. |
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| 1: | Laboratoire Navier |
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Ecole des Ponts ParisTech – CNRS : UMR8205 – IFSTTAR |
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| Rhéophysique Milieux poreux |
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| Subject | : | Physics/Condensed Matter/Soft Condensed Matter |
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| Yield stress – shear banding – shear localization – thixotropy – complex fluids |
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| hal-00454772, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00454772 | |
| oai:hal.archives-ouvertes.fr:hal-00454772 | |
| From: Guillaume Ovarlez | |
| Submitted on: Tuesday, 9 February 2010 11:55:23 | |
| Updated on: Monday, 29 March 2010 10:20:45 | |
