Vorticity structuring and velocity rolls triggered by gradient shear bands.
We suggest a mechanism by which vorticity structuring and 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.
School of Mathematics and Manchester Centre for Nonlinear Dynamics, University of Manchester, Booth Street East, Manchester M13 9EP, United Kingdom. suzanne.fielding@manchester.ac.uk
Suzanne M
SM
Fielding