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Lookup NU author(s): Dr Andrew Baggaley,
Professor Carlo Barenghi
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By numerically integrating in time the motion of vortex filaments, we study how the nonlinear interaction of Kelvin waves along vortices generates Kelvin waves of larger and larger wavenumbers (smaller and smaller wavelength). At sufficiently large wavenumbers the angular velocity of the vortices is large enough that kinetic energy is lost by sound emission. This turbulent cascade of Kelvin waves should explain why turbulence, generated in superfluid helium at very low temperature near absolute zero, quickly decays, despite the lack of any viscous dissipation.
Author(s): Baggaley AW, Barenghi CF
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 13th European Turbulence Conference: Vorticity Dynamics
Year of Conference: 2011
Pages: Article no. 062001
Publisher: Institute of Physics Publishing Ltd.
Library holdings: Search Newcastle University Library for this item
Series Title: Journal of Physics Conference Series