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Triggers and signatures of shear banding in steady and time-dependent flows

Fielding, S.M.

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Abstract

This précis is aimed as a practical field guide to situations in which shear banding might be expected in complex fluids subject to an applied shear flow. Separately for several of the most common flow protocols, it summarizes the characteristic signatures in the measured bulk rheological signals that suggest the presence of banding in the underlying flow field. It does so both for a steady applied shear flow and for the time-dependent protocols of shear startup, step stress, finite strain ramp, and large amplitude oscillatory shear. An important message is that banding might arise rather widely in flows with a strong enough time dependence, even in fluids that do not support banding in a steadily applied shear flow. This suggests caution in comparing experimental data with theoretical calculations that assume a homogeneous shear flow. In a brief postlude, we also summarize criteria in similar spirit for the onset of necking in extensional filament stretching.

Citation

Fielding, S. (2016). Triggers and signatures of shear banding in steady and time-dependent flows. Journal of Rheology, 60(5), 821-834. https://doi.org/10.1122/1.4961480

Journal Article Type Article
Acceptance Date Apr 6, 2016
Online Publication Date Sep 12, 2016
Publication Date Sep 12, 2016
Deposit Date Nov 24, 2016
Publicly Available Date Sep 12, 2017
Journal Journal of Rheology
Print ISSN 0148-6055
Electronic ISSN 1520-8516
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 60
Issue 5
Pages 821-834
DOI https://doi.org/10.1122/1.4961480

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Copyright Statement
© 2016 The Society of Rheology. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Fielding, S. M. (2016). Triggers and signatures of shear banding in steady and time-dependent flows. Journal of Rheology 60(5): 821-834 and may be found at https://doi.org/10.1122/1.4961480





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