Helicity and topology of a small region of quantum vorticity

Helicity and topology of a small region of quantum vorticity

We numerically study the evolution of a small turbulent region of quantised vorticity in superfluid helium, a regime which can be realised in the laboratory. We show that the turbulence achieves a fluctuating steady-state in terms of dynamics (energy), geometry (length, writhing) and topology (linki...

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Veröffentlicht in:Fluid dynamics research 2018-02, Vol.50 (1), p.11403
Hauptverfasser: Mesgarnezhad, M, Cooper, R G, Baggaley, A W, Barenghi, C F
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hydrodynamic aspects of superfluidity
quantum vorticity
vortices and turbulence
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creator Mesgarnezhad, M
Cooper, R G
Baggaley, A W
Barenghi, C F
description We numerically study the evolution of a small turbulent region of quantised vorticity in superfluid helium, a regime which can be realised in the laboratory. We show that the turbulence achieves a fluctuating steady-state in terms of dynamics (energy), geometry (length, writhing) and topology (linking). We show that, at any instant, the turbulence consists of many unknots and few large loops of great geometrical and topological complexity.
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subjects hydrodynamic aspects of superfluidity
quantum vorticity
vortices and turbulence
title Helicity and topology of a small region of quantum vorticity
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