This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1122/1.2750665 in citations.
Please use the identifier: http://hdl.handle.net/2128/18118 in citations.
Superposition rheology of shear-banding wormlike micelles
Superposition rheology of shear-banding wormlike micelles
Wormlike micelle solutions are submitted to small-amplitude oscillatory shear superimposed to steady shear in the shear banding regime. By imposing a shear oscillation, the interface between high- and low-shear regions oscillates in time. A two-fluid semiphenomenological model is proposed for superp...
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Personal Name(s): | Ballesta, P. |
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Lettinga, M. P. / Manneville, S. | |
Contributing Institute: |
Weiche Materie; IFF-7 |
Published in: | Journal of rheology online, 51 (2007) S. 1047 - 1072 |
Imprint: |
Melville, NY [u.a.]
Inst.
2007
|
Physical Description: |
1047 - 1072 |
DOI: |
10.1122/1.2750665 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Journal of Rheology
51 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/18118 in citations.
Wormlike micelle solutions are submitted to small-amplitude oscillatory shear superimposed to steady shear in the shear banding regime. By imposing a shear oscillation, the interface between high- and low-shear regions oscillates in time. A two-fluid semiphenomenological model is proposed for superposition rheology in the shear banding regime, which allows us to extract a characteristic velocity for the interface dynamics from experiments involving only a standard rheometer. Estimates of the stress diffusion coefficient D can also be inferred from such superposition experiments. The validity of our model is confirmed by directly recording the interface displacement using ultrasonic velocimetry. (c) 2007 The Society of Rheology. |