Viscoelastic Taylor-Couette instability of shear banded flow

Fielding, S.M.

doi:10.1103/physrevlett.104.198303

Viscoelastic Taylor-Couette instability of shear banded flow

Fielding, S.M.

Authors

Professor Suzanne Fielding suzanne.fielding@durham.ac.uk
Professor

Abstract

We study numerically shear banded flow in planar and curved Couette geometries. Our aim is to capture two recent observations in shear banding systems of roll cells stacked in the vorticity direction, associated with an undulation of the interface between the bands. Depending on the degree of cell curvature and on the material’s constitutive properties, we find either (i) an instability of the interface between the bands driven by a jump in second normal stress across it or (ii) a bulk viscoelastic Taylor-Couette instability in the high shear band driven by a large first normal stress within it. Both lead to roll cells and interfacial undulations but with a different signature in each case, thereby suggesting that the roll cells in each of the recent experiments are different in origin.

Citation

Fielding, S. (2010). Viscoelastic Taylor-Couette instability of shear banded flow. Physical Review Letters, 104(19), Article 198303. https://doi.org/10.1103/physrevlett.104.198303

Journal Article Type	Article
Publication Date	May 1, 2010
Deposit Date	Jun 1, 2010
Publicly Available Date	Nov 28, 2012
Journal	Physical Review Letters
Print ISSN	0031-9007
Electronic ISSN	1079-7114
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	104
Issue	19
Article Number	198303
DOI	https://doi.org/10.1103/physrevlett.104.198303