Large-scale normal fluid circulation in helium superflows

Abstract

We perform fully-coupled numerical simulations of helium II pure superflows in a channel, with vortex- line density typical of experiments. Peculiar to our model is the computation of the back-reaction of the superfluid vortex motion on the normal fluid and the presence of solid boundaries. We recover the uniform vortex-line density experimentally measured employing second sound resonators and we show that pure superflow in helium II is associated with a large-scale circulation of the normal fluid which can be detected using existing particle-tracking visualization techniques.

17 pages, 4 figures. acccepted in Phys. Rev. B. arXiv admin note: text overlap with arXiv:1506.00464

References in corpus (4)

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