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Home > Research > Publications & Outputs > Energy cascades and rogue waves in superfluid He-4
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Energy cascades and rogue waves in superfluid He-4

Research output: Contribution to journalJournal article

Published

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Journal publication date2009
JournalJournal of Physics: Conference Series
Journal number3
Volume150
Number of pages4
Pages-
Original languageEnglish

Conference

Conference25th International Conference on Low Temperature Physics (LT25)
CityAmsterdam
Period6/08/0813/08/08

Abstract

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.