Dynamic Remanent Vortices in Superfluid 3He-B
arXiv:cond-mat/0607323 · doi:10.1007/s10909-007-9380-3
Abstract
We investigate the decay of vortices in a rotating cylindrical sample of 3He-B, after rotation has been stopped. With decreasing temperature vortex annihilation slows down as the damping in vortex motion, the mutual friction dissipation α(T), decreases almost exponentially. Remanent vortices then survive for increasingly long periods, while they move towards annihilation in zero applied flow. After a waiting period Δt at zero flow, rotation is reapplied and the remnants evolve to rectilinear vortices. By counting these lines, we measure at temperatures above the transition to turbulence ~0.6T_c the number of remnants as a function of α(T) and Δt. At temperatures below the transition to turbulence T \lesssim 0.55 T_c, remnants expanding in applied flow become unstable and generate in a turbulent burst the equilibrium number of vortices. Here we measure the onset temperature T_on of turbulence as a function of Δt, applied flow velocity, and length of sample L.
Submitted to the proceedings of the Quantum Fluids and Solids Conference 2006 (to be published in Journal of Low Temperature Physics 2007) New data are added
References in corpus (3)
Cited by in corpus (9)
- Dynamics of vortices and interfaces in superfluid 3He
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- Vortex core contribution to textural energy in 3He-B below 0.4Tc
- Experiments on the twisted vortex state in superfluid 3He-B
- Textures of Superfluid 3He-B in Applied Flow and Comparison with Hydrostatic Theory
- Precessing vortex motion and instability in a rotating column of superfluid 3He-B
- Turbulent Vortex Flow Responses at the AB Interface in Rotating Superfluid 3He-B
- The dynamics of vortex generation in superfluid 3He-B