The decay of a quantized vortex ring and the influence of tracer particles

Gregory P. Bewley, K. R. Sreenivasan

Research output: Contribution to journalArticle

Abstract

We capture the decay of a quantized vortex ring in superfluid helium-4 by imaging particles trapped on the vortex core. The ring shrinks in time, providing direct evidence for the dissipation of energy in the superfluid. The ring with trapped particles collapses more slowly than predicted by an available theory, but the collapse rate can be predicted correctly if the trapping of the particles on the core is taken into account. We theoretically explore the conditions under which particles may be considered passive tracers of quantized vortices and estimate, in particular, that their dynamics on the large-scale is largely unaffected by the burden of trapped particles if the latter are spaced by more than ten particle diameters along the vortex core, at temperatures between 1.5 K and 2.1 K.

Original languageEnglish (US)
Pages (from-to)84-94
Number of pages11
JournalJournal of Low Temperature Physics
Volume156
Issue number3-6
DOIs
StatePublished - 2009

Fingerprint

vortex rings
trapped particles
tracers
Vortex flow
vortices
decay
helium isotopes
rings
Superfluid helium
dissipation
trapping
estimates
Imaging techniques
temperature
energy
Temperature

Keywords

  • Quantized vortex
  • Superfluid helium

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

Cite this

The decay of a quantized vortex ring and the influence of tracer particles. / Bewley, Gregory P.; Sreenivasan, K. R.

In: Journal of Low Temperature Physics, Vol. 156, No. 3-6, 2009, p. 84-94.

Research output: Contribution to journalArticle

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