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Instabilité de Faraday dans les fluides complexes

Abstract : Since Faraday's founding work in 1831, it is known that the surface of a vertically vibrated fluid layers undergoes the Faraday instability when the forcing acceleration is greater than some critical value. Surface waves appear at the surface and form geometrical patterns characterised by a critical wavelength. We focus on the behaviour in complex fluids to such a hydrodynamic instability. Whe show that a strong coupling between the instability and the fluid microstructure may occur depending on the complex fluid. In semi-dilute wormlike micelles solutions, this coupling gives rise to standing elastic waves. In dilute wormlike micelles solutions, a shear-thickening phenomenom may be induced by the surfaces waves. And in suspensions of rod-like colloids localised alignment takes place.
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https://tel.archives-ouvertes.fr/tel-00811893
Contributor : Nadine Laffargue <>
Submitted on : Thursday, April 11, 2013 - 11:39:11 AM
Last modification on : Thursday, January 11, 2018 - 6:14:59 AM
Long-term archiving on: : Friday, July 12, 2013 - 4:05:58 AM

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  • HAL Id : tel-00811893, version 1

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Citation

Pierre Ballesta. Instabilité de Faraday dans les fluides complexes. Matière Molle [cond-mat.soft]. Université Sciences et Technologies - Bordeaux I, 2006. Français. ⟨tel-00811893⟩

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