| Issue |
EPL
Volume 86, Number 3, May 2009
|
|
|---|---|---|
| Article Number | 34002 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/86/34002 | |
| Published online | 18 May 2009 | |
Polymer conformations and hysteretic stresses in nonstationary flows of polymer solutions
Université Bordeaux 1, Centre de Physique Moléculaire Optique et Hertzienne (UMR 5798 du CNRS) 351 cours de la Libération, 33405 Talence, France, EU
Received:
10
February
2009
Accepted:
16
April
2009
The low Reynolds number flow of a polymer solution around a cylinder engenders a nonlinear drag force vs. the flow velocity. A velocity quench of such a flow gives rise to a long time relaxation and hysteresis of the stress due to history-dependent elastic effects. Our results suggest that such hysteretic behavior has its origin in the long time relaxation dynamics and hysteresis of the polymer conformations.
PACS: 47.57.Ng – Polymers and polymer solutions / 47.57.Qk – Rheological aspects / 47.61.-k – Micro- and nano-scale flow phenomena
© EPLA, 2009
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