Large-scale superfluid vortex rings at nonzero temperatures

Abstract

We numerically model experiments in which large-scale vortex rings - bundles of quantized vortex loops - are created in superfluid helium by a piston-cylinder arrangement. We show that the presence of a normal fluid vortex ring together with the quantized vortices is essential to explain the coherence of these large-scale vortex structures at nonzero temperatures, as observed experimentally. Finally we argue that the interaction of superfluid and normal fluid vortex bundles is relevant to recent investigations of superfluid turbulence.

8 pages, 5 figures

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Cited by in corpus (6)

• Single and Multiple Vortex Rings in Three-Dimensional Bose-Einstein Condensates: Existence, Stability and Dynamics
• Spectral and dynamical analysis of a single vortex ring in anisotropic harmonically trapped three-dimensional Bose-Einstein condensates
• Controlled creation of three-dimensional vortex structures in Bose--Einstein condensates using artificial magnetic fields
• Symmetry-breaking instability of leapfrogging vortex rings in a Bose-Einstein condensate
• On the determination of vortex ring vorticity using Lagrangian particles
• A Hamiltonian Bifurcation Perspective on Two Interacting Vortex Pairs: From Symmetric to Asymmetric Leapfrogging, Period Doubling and Chaos