Motion of vortex ring with tracer particles in superfluid helium

Details Motion of vortex ring with tracer particles in superfluid helium Motion of vortex ring with tracer particles in superfluid helium

2009-05-29

arxiv.org/abs/0905.4797v1

Physics

Condensed Matter

Other Condensed Matter

14 pages, 5 figures

Scientific paper

Recent experiments on quantum turbulence in superfluid helium made use of small tracer particles to track the motion of quantized vortices, determine velocity statistics and visualize vortex reconnections. A problem with this visualization technique is that it may change the turbulent flow which it visualizes. To address this problem, we derive and solve the equations of motion of a quantized vortex ring which contains a given number of particles trapped on the vortex core, hence derive a quantitative criterion to determine in which measure small particles trapped in quantized vortices affect vortex motion. Finally we apply the criterion to a recent experiment.

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