Quantum turbulence in propagating superfluid vortex front

Abstract

We present experimental, numerical and theoretical studies of a vortex front propagating into a region of vortex-free flow of rotating superfluid 3He-B. We show that the nature of the front changes from laminar through quasi-classical turbulent to quantum turbulent with decreasing temperature. Our experiment provides the first direct measurement of the dissipation rate in turbulent vortex dynamics of 3He-B and demonstrates that the dissipation is temperature- and mutual friction-independent in the T->0 limit, and is strongly suppressed when the Kelvin-wave cascade on vortex lines is predicted to be involved in the turbulent energy transfer to smaller length scales.

4 pages, 2 figures

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• Bottleneck crossover between classical and quantum superfluid turbulence
• A Kelvin-wave cascade on a vortex in superfluid ${}^4$He at a very low temperature
• Dynamics of vortices and interfaces in superfluid 3He
• Classical and quantum regimes of the superfluid turbulence
• Twisted vortex state

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• The sensitivity of the vortex filament method to different reconnection models
• Gradual eddy-wave crossover in superfluid turbulence
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• Energy and Vorticity Spectra in Turbulent Superfluid ${}^4$He from $T=0$ to $T_{\lambda }$
• Super Stability of Laminar Vortex Flow in Superfluid 3He-B
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• Mutual friction in superfluid ${}^3$He-B in the low-temperature regime
• Quasiparticle scattering measurements of laminar and turbulent vortex flow in the spin-down of superfluid 3He-B
• Textures of Superfluid 3He-B in Applied Flow and Comparison with Hydrostatic Theory
• Turbulent Vortex Flow Responses at the AB Interface in Rotating Superfluid 3He-B
• Precessing vortex motion and instability in a rotating column of superfluid 3He-B
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