Large-scale normal fluid circulation in helium superflows
Other Condensed Matter
2017-01-18 v2
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.
Cite
@article{arxiv.1610.03690,
title = {Large-scale normal fluid circulation in helium superflows},
author = {Luca Galantucci and Michele Sciacca and Carlo F. Barenghi},
journal= {arXiv preprint arXiv:1610.03690},
year = {2017}
}
Comments
17 pages, 4 figures. acccepted in Phys. Rev. B. arXiv admin note: text overlap with arXiv:1506.00464