The Faraday instability in wormlike micelle solutions

Abstract : The behaviour of semi-dilute wormlike micelle solutions under vertical vibrations is investigated using classical measurements of the Faraday instability threshold along with two new experiments based on particle imaging velocimetry and birefringence. We provide evidence for the presence of oscillations of the critical acceleration and wave number with the vibration frequency, which are linked to oscillations of the velocity and birefringence fields along the vertical direction. These observations are interpreted in terms of standing elastic waves across the fluid layer. Such an interpretation is confirmed numerically by using the model proposed by Kumar [S. Kumar, Vibration-induced interfacial instabilities in viscoelastic fluids, Phys. Rev. E 65 (2002) 026305] for a viscoelastic fluid to calculate the velocity and deformation fields. Finally, further birefringence experiments above the instability threshold show that the Faraday instability does not induce disentanglement and breakage of the micellar network.
Complete list of metadatas

Cited literature [39 references]  Display  Hide  Download

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00526693
Contributor : Sébastien Manneville <>
Submitted on : Friday, October 15, 2010 - 2:49:07 PM
Last modification on : Thursday, April 19, 2018 - 2:54:03 PM
Long-term archiving on : Sunday, January 16, 2011 - 2:53:18 AM

File

jnnfm_faraday.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Pierre Ballesta, Sébastien Manneville. The Faraday instability in wormlike micelle solutions. Journal of Non-Newtonian Fluid Mechanics, Elsevier, 2007, 147 (1-2), pp.23-34. ⟨10.1016/j.jnnfm.2007.06.006⟩. ⟨ensl-00526693⟩

Share

Metrics

Record views

146

Files downloads

152