6533b82cfe1ef96bd128ffba
RESEARCH PRODUCT
Coupled normal fluid and superfluid profiles of turbulent helium II in channels
Luca GalantucciMichele SciaccaCarlo F. Barenghisubject
Quantum fluidPhysicsCondensed matter physicsPlane (geometry)TurbulenceFluid Dynamics (physics.flu-dyn)FOS: Physical sciencesquantum turbulencechemistry.chemical_elementMechanicsPhysics - Fluid DynamicsCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsOpen-channel flowVortexSuperfluidityCondensed Matter - Other Condensed MatterchemistryMetastabilitySuperfluid heliumSettore MAT/07 - Fisica MatematicaHeliumOther Condensed Matter (cond-mat.other)description
We perform fully coupled two--dimensional numerical simulations of plane channel helium II counterflows with vortex--line density typical of experiments. The main features of our approach are the inclusion of the back reaction of the superfluid vortices on the normal fluid and the presence of solid boundaries. Despite the reduced dimensionality, our model is realistic enough to reproduce vortex density distributions across the channel recently calculated in three--dimensions. We focus on the coarse--grained superfluid and normal fluid velocity profiles, recovering the normal fluid profile recently observed employing a technique based on laser--induced fluorescence of metastable helium molecules.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 |