| HAL : hal-00505410, version 2 |
| arXiv : 1007.4133 |
| DOI : 10.1209/0295-5075/91/68005 |
| Fiche détaillée | Récupérer au format |
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| Europhysics Letters (EPL) 91 (2010) 68005 |
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| Versions disponibles : | v1 (23-07-2010) | v2 (03-05-2011) |
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| Investigation of shear banding in three-dimensional foams |
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| Guillaume Ovarlez 1Kapil Krishan 2, 3 |
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| (2010) |
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| We study the steady flow properties of different three-dimensional aqueous foams in a wide gap Couette geometry. From local velocity measurements through Magnetic Resonance Imaging techniques and from viscosity bifurcation experiments, we find that these foams do not exhibit any observable signature of shear banding. This contrasts with two previous results (Rodts et al., Europhys. Lett., 69 (2005) 636 and Da Cruz et al., Phys. Rev. E, 66 (2002) 051305); we discuss possible reasons for this dicrepancy. Moreover, the foams we studied undergo steady flow for shear rates well below the critical shear rate recently predicted (Denkov et al., Phys. Rev. Lett., 103 (2009) 118302). Local measurements of the constitutive law finally show that these foams behave as simple Herschel-Bulkley yield stress fluids. |
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| 1 : | Laboratoire Navier |
| Ecole des Ponts ParisTech – CNRS : UMR8205 – IFSTTAR | |
| 2 : | Laboratoire de Physique des Matériaux Divisés et des Interfaces (LPMDI) |
| Université Paris-Est Marne-la-Vallée (UPEMLV) : EA7264 | |
| 3 : | School of Physical Sciences |
| Jawaharlal Nehru University | |
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| Rhéophysique |
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| Domaine | : | Physique/Matière Condensée/Matière Molle |
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| Foams – shear-banding – constitutive law |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00505410, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00505410 | |
| oai:hal.archives-ouvertes.fr:hal-00505410 | |
| Contributeur : Guillaume Ovarlez | |
| Soumis le : Lundi 2 Mai 2011, 16:09:23 | |
| Dernière modification le : Mardi 3 Mai 2011, 09:02:37 | |