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| HAL: hal-00000441, version 3 |
| arXiv: cond-mat/0306590 |
| Detailed view |  Export this paper |
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| Available versions: | v1 (2003-06-24) | v2 (2004-07-28) | v3 (2004-11-26) |
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| Foam in a two-dimensional Couette shear: a local measurement of bubble deformation. |
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| Eric Janiaud 1Francois Graner 2 |
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| (2003-06-23) |
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| We re-analyse experiments on a foam sheared in a two-dimensional Couette geometry [Debrégeas et al., Phys. Rev. Lett. 87, 178305 (2001)]. We characterise the bubble deformation by a texture tensor. Our measurements are local in time: they show two regimes, one transient and one stationary. They provide both the average and fluctuations of the anisotropy. Measurements are also local in space: they show that both the deformation and the elastic contribution to the stress field do not localise, varying smoothly across the shear gap. We can thus describe the foam as a continuous medium with elastic properties. |
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| 1: | Laboratoire des Milieux Désordonnés et Hétérogènes (LMDH) |
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CNRS : UMR7603 – Université Paris VI - Pierre et Marie Curie |
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| 2: | Laboratoire de Spectrométrie Physique (LSP) |
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CNRS : UMR5588 – Université Joseph Fourier - Grenoble I |
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| Subject | : | Physics/Condensed Matter/Soft Condensed Matter Physics/Condensed Matter/Materials Science Physics/Condensed Matter/Disordered Systems and Neural Networks |
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| two-dimensional foam – texture tensor – Couette shear |
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| Attached file list to this document: | ||||||||||
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| hal-00000441, version 3 | |
| http://hal.archives-ouvertes.fr/hal-00000441 | |
| oai:hal.archives-ouvertes.fr:hal-00000441 | |
| From: François Graner | |
| Submitted on: Thursday, 25 November 2004 17:31:08 | |
| Updated on: Friday, 26 November 2004 09:38:55 | |
