# Perspectives on shear banding in complex fluids

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## Abstract

In this review, I present an idiosyncratic view of the current state of shear banding in complex fluids. Particular attention is paid to some of the outstanding issues and questions facing the field, including the applicability of models that have “traditionally” been used to model experiments; future directions and challenges for experimentalists; and some of the issues surrounding vorticity banding, which has been discussed theoretically and whose experiments are fewer in number yet, in many ways, more varied in character.

## Keywords

Constitutive instabilities Shear-induced structure formation Shear banding Shear thinning Nonlinear viscoelasticity Spatiotemporal structure formation## Notes

### Acknowledgements

I thank David Lu, Simon Marlow, Ovidiu Radulescu, Georgina Wilkins, James Adams, and especially Suzanne Fielding for enjoyable and fruitful collaborations and a host of the experimental shear banding community for continual inspiration; much of this work was supported by the Engineering and Physical Sciences Research Council (UK).

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