Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2009-12-11
Physics
Condensed Matter
Soft Condensed Matter
4 pages, submitted for publication
Scientific paper
We study numerically shear banded flow in planar and curved Couette geometries. Our aim is to explain 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. Our work thereby suggests a different origin for the roll cells in each of the recent experiments.
No associations
LandOfFree
Viscoelastic Taylor-Couette instability of shear banded flow does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Viscoelastic Taylor-Couette instability of shear banded flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Viscoelastic Taylor-Couette instability of shear banded flow will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-468840