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arXiv · 0708.3003

The dynamics of vortex generation in superfluid 3He-B

R. de Graaf·R. Hanninen·T. V. Chagovets·V. B. Eltsov·M. Krusius·R. E. Solntsev
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Abstract

A profound change occurs in the stability of quantized vortices in externally applied flow of superfluid 3He-B at temperatures ~ 0.6 Tc, owing to the rapidly decreasing damping in vortex motion with decreasing temperature. At low damping an evolving vortex may become unstable and generate a new independent vortex loop. This single-vortex instability is the generic precursor to turbulence. We investigate the instability with non-invasive NMR measurements on a rotating cylindrical sample in the intermediate temperature regime (0.3 - 0.6) Tc. From comparisons with numerical calculations we interpret that the instability occurs at the container wall, when the vortex end moves along the wall in applied flow.

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R. de Graaf, R. Hanninen, T. V. Chagovets, V. B. Eltsov, M. Krusius, R. E. Solntsev. 2008-09-12. The dynamics of vortex generation in superfluid 3He-B. https://doi.org/10.1007/s10909-008-9827-1

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