Interface instability in shear banding flow
Soft Condensed Matter
2009-11-11 v1
Abstract
We report on the spatio-temporal dynamics of the interface in shear-banding flow of a wormlike micellar system (cetyltrimethylammonium bromide and sodium nitrate in water) during a start-up experiment. Using the scattering properties of the induced structures, we demonstrate the existence of an instability of the interface between bands along the vorticity direction. Different regimes of spatio-temporal dynamics of the interface are indentified along the stress plateau. We build a model based on the flow symetry which qualitatively describes the observed patterns.
Cite
@article{arxiv.cond-mat/0601708,
title = {Interface instability in shear banding flow},
author = {S. Lerouge and M. Argentina and J. P. Decruppe},
journal= {arXiv preprint arXiv:cond-mat/0601708},
year = {2009}
}