Energy cascades and rogue waves in superfluid He-4

Ganshyn, Andriy and Efimov, Victor and Kolmakov, G. V. and Mezhov-Deglin, L. P. and McClintock, P. V. E. (2009) Energy cascades and rogue waves in superfluid He-4. Journal of Physics: Conference Series, 150 (3): 032056. -. ISSN 1742-6596

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We report the results of recent experiments on second sound in a high Q resonator. Nonlinear wave interactions give rise to a form of acoustic turbulence in which there is a Kolmogorov-like cascade of energy through the frequency scales from the frequency at which it is injected towards higher frequencies until, eventually, dissipative processes come to dominate and terminate the energy flux. We report that that, under some circumstances, an inverse energy cascade occurs, whereby there is a steady flux of energy towards lower frequencies, a wholly unexpected result that bears on the suggestion that rogue waves on the ocean may arise through nonlinear interactions between conventional wind-blown waves.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Physics: Conference Series
Uncontrolled Keywords:
?? 2nd soundinstabilityturbulencepropagationphysicsphysics and astronomy(all)qc physics ??
ID Code:
Deposited On:
07 Jan 2010 09:28
Last Modified:
06 Jan 2024 00:10