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

Fielding, S. M. (2016) 'Triggers and signatures of shear banding in steady and time-dependent flows.', Journal of rheology., 60 (5). pp. 821-834.

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.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1122/1.4961480
Publisher 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
Date accepted:06 April 2016
Date deposited:14 December 2016
Date of first online publication:12 September 2016
Date first made open access:12 September 2017

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