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| VOLUME 83 | ISSUE 5 |
PAGE 238
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| Differential approximation for Kelvin-wave turbulence
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S. Nazarenko
Mathematics Institute, University of Warwick, Coventry CV4 7AL, UK
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PACS: 67.40.Vs
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Abstract
I present a nonlinear differential equation model (DAM) for the spectrum of Kelvin waves on a thin vortex filament. This model preserves the original scaling of the six-wave kinetic equation, its direct and inverse cascade solutions, as well as the thermodynamic equilibrium spectra. Further, I extend DAM to include the effect of sound radiation by Kelvin waves. I show that, because of the phonon radiation, the turbulence spectrum ends at a maximum frequency where ε is the total energy injection rate, cs is the speed of sound and κ is the quantum of circulation.
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