3 years ago

The Marangoni effect on small-amplitude capillary waves in viscous fluids.

Daniele Dini, Fabian Denner, Neal Morgan, Li Shen, Berend van Wachem

We derive a general integrodifferential equation for the transient behaviour of small-amplitude capillary waves on the planar surface of a viscous fluid in the presence of the Marangoni effect. The equation is solved for an insoluble surfactant solution in concentration below the critical micelle concentration (cmc) undergoing convective-diffusive surface transport. The special case of a diffusion-driven surfactant is considered near the the critical damping wavelength. The Marangoni effect is shown to contribute to the overall damping mechanism and a first-order term correction to the critical wavelength with respect to the surfactant concentration difference and the Schmidt number is proposed.

Publisher URL: http://arxiv.org/abs/1710.10137

DOI: arXiv:1710.10137v1

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