Criterion for purely elastic Taylor-Couette instability in the flows of shear-banding fluids
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McKinley_Criterion for purely.pdf
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Author(s)
Fardin, Marc-Antoine
Ober, Thomas Joseph
Gay, C.
Gregoire, G.
McKinley, Gareth H.
Lerouge, S.
Date Issued
November 2011
Journal
Europhysics Letters
Publisher
Institute of Physics Publishing
Citation
Fardin, M. A., T. J. Ober, C. Gay, et al. 2011Criterion for Purely Elastic Taylor-Couette Instability in the Flows of Shear-banding Fluids. EPL (Europhysics Letters) 96(4): 44004.
Version
Author's final manuscript
Abstract
In the past twenty years, shear-banding flows have been probed by various techniques, such as rheometry, velocimetry and flow birefringence. In micellar solutions, many of the data collected exhibit unexplained spatio-temporal fluctuations. Recently, it has been suggested that those fluctuations originate from a purely elastic instability of the flow. In cylindrical Couette geometry, the instability is reminiscent of the Taylor-like instability observed in viscoelastic polymer solutions. In this letter, we describe how the criterion for purely elastic Taylor-Couette instability should be adapted to shear-banding flows. We derive three categories of shear-banding flows with curved streamlines, depending on their stability.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1209/0295-5075/96/44004
