Vorticity structuring and Taylor-like velocity rolls triggered by gradient shear bands

Abstract

We suggest a novel mechanism by which vorticity structuring and Taylor-like velocity rolls can form in complex fluids, triggered by the linear instability of one dimensional gradient shear banded flow. We support this with a numerical study of the diffusive Johnson-Segalman model. In the steady vorticity structured state, the thickness of the interface between the bands remains finite in the limit of zero stress diffusivity, presenting a possible challenge to the accepted theory of shear banding.

9 pages, 5 figures

References in corpus (3)

• Flow phase diagrams for concentration-coupled shear banding
• Spatio-temporal dynamics of wormlike micelles under shear
• Interface instability in shear banding flow

Cited by in corpus (2)

• Shear-induced transitions and instabilities in surfactant wormlike micelles
• Taylor-like vortices in the shear-banding flow of giant micelles