Signature of elasticity in the Faraday instability

Abstract

We investigate the onset of the Faraday instability in a vertically vibrated wormlike micelle solution. In this strongly viscoelastic fluid, the critical acceleration and wavenumber are shown to present oscillations as a function of driving frequency and fluid height. This effect, unseen neither in simple fluids nor in previous experiments on polymeric fluids, is interpreted in terms of standing elastic waves between the disturbed surface and the container bottom. It is shown that the model of S. Kumar [Phys. Rev. E, {\bf 65}, 026305 (2002)] for a viscoelastic fluid accounts qualitatively for our experimental observations. Explanations for quantitative discrepancies are proposed, such as the influence of the nonlinear rheological behaviour of this complex fluid.

arXiv comment4 pages, 4 figures

References in corpus (3)

• Faraday waves on a viscoelastic liquid
• Amplitude equations and pattern selection in Faraday waves
• Persistent holes in a fluid

Cited by in corpus (7)

• Fingering instabilities of a reactive micellar interface
• Shear-induced transitions and instabilities in surfactant wormlike micelles
• Surfactant micelles: model systems for flow instabilities of complex fluids
• Viscoelastic surface instabilities
• The Faraday instability in wormlike micelle solutions
• Shear-thickening induced by Faraday waves in dilute wormlike micelles
• Interplay between a hydrodynamic instability and a phase transition: the Faraday instability in dispersions of rodlike colloids