Friday, October 19, 2012

1210.5194 (Enrico Fonda et al.)

Visualization of Kelvin waves on quantum vortices    [PDF]

Enrico Fonda, David P. Meichle, Nicholas T. Ouellette, Sahand Hormoz, Katepalli R. Sreenivasan, Daniel P. Lathrop
In superfluid helium, vorticity is quantized and constrained on line-like phase singularities, called quantum or quantized vortices. By visualizing the motion of sub-micron frozen particles in superfluid $^{4}$He, we directly observe for the first time the helical Kelvin waves excited after quantized vortex reconnections. We compare the data with self-similar solutions of vortex filament models. We report the results in a fluid dynamic video.
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