6533b7d0fe1ef96bd125b88f
RESEARCH PRODUCT
Large-scale normal fluid circulation in helium superflows
Luca GalantucciMichele SciaccaCarlo F. Barenghisubject
PhysicsComputationnormal and superfluid profilesFOS: Physical scienceschemistry.chemical_elementMechanics01 natural sciences010305 fluids & plasmasVortexCondensed Matter - Other Condensed MatterSuperfluidityResonatorClassical mechanicsCirculation (fluid dynamics)chemistry0103 physical sciencesSecond soundvortex pointpure superflow010306 general physicsSettore MAT/07 - Fisica MatematicaHeliumOther Condensed Matter (cond-mat.other)Line (formation)Superfluid Heliumdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-13 |