Precessing vortex motion and instability in a rotating column of superfluid 3He-B
arXiv:cond-mat/0701647 · doi:10.1007/s10909-009-9873-3
Abstract
The flow of quantized vortex lines in superfluid 3He-B is laminar at high temperatures, but below 0.6 Tc turbulence becomes possible, owing to the rapidly decreasing mutual friction damping. In the turbulent regime a vortex evolving in applied flow may become unstable, create new vortices, and start turbulence. We monitor this single-vortex instability with NMR techniques in a rotating cylinder. Close to the onset temperature of turbulence, an oscillating component in NMR absorption has been observed, while the instability generates new vortices at a low rate ~ 1 vortex/s, before turbulence sets in. By comparison to numerical calculations, we associate the oscillations with spiral vortex motion, when evolving vortices expand to rectilinear lines.
revised version: 7.3 pages, 9 figures submitted to Phys. Rev. B
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Cited by in corpus (7)
- Turbulent dynamics in rotating helium superfluids
- Quantum turbulence in superfluids with wall-clamped normal component
- 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
- Vortex pinning by surface geometry in superfluid helium
- Asymptotic motion of a single vortex in a rotating cylinder
- Andreev reflection in rotating superfluid He-B