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Article Dans Une Revue Physical Review Letters Année : 2006

Interface Instability in Shear-Banding Flow

Résumé

We report on the spatio-temporal dynamics of the interface in shear-banding flow of a wormlike micellar system (cetyltrimethylammonium bromide and sodium nitrate in water) during a start-up experiment. Using the scattering properties of the induced structures, we demonstrate the existence of an instability of the interface between bands along the vorticity direction. Different regimes of spatio-temporal dynamics of the interface are indentified along the stress plateau. We build a model based on the flow symetry which qualitatively describes the observed patterns.
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hal-00017892 , version 1 (26-01-2006)

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Sandra Lerouge, Médéric Argentina, Jean-Paul Decruppe. Interface Instability in Shear-Banding Flow. Physical Review Letters, 2006, 96 (8), pp.088301. ⟨10.1103/PhysRevLett.96.088301⟩. ⟨hal-00017892⟩
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