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Rheologica Acta

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01.10.2010 | Original Contribution

Anomalous shear banding: multidimensional dynamics under fluctuating slip conditions

verfasst von: Kirk W. Feindel, Paul T. Callaghan

Erschienen in: Rheologica Acta | Ausgabe 10/2010

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Abstract

The strain-controlled flow of a wormlike micellar solution in cylindrical Couette geometries with smooth and rough glass inner walls is investigated using 2D ¹H NMR velocimetry. We find anomalous shear banding in which fluctuating slip dynamics in combination with surfactant properties lead to a non-lever rule behaviour where the interface position remains constant while the high and low shear rates change. Velocities in the flow direction are imaged in the flow-gradient/vorticity plane. The spatiotemporal resolution achieved reveals fluctuations in flow structure along the vorticity axis and instability of the high shear band.

Vorheriger Artikel The effect of particle size and migration on the formation of flow-induced structures in viscoelastic suspensions

Nächster Artikel Rheological and morphological properties of PA6/ECO nanocomposites

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Titel: Anomalous shear banding: multidimensional dynamics under fluctuating slip conditions
verfasst von: Kirk W. Feindel
Paul T. Callaghan
Publikationsdatum: 01.10.2010
Verlag: Springer-Verlag
Erschienen in: Rheologica Acta / Ausgabe 10/2010
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-010-0470-9

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