Experimental, numerical, and analytical velocity spectra in turbulent quantum fluid

Turbulence in superfluid helium is unusual and presents a challenge to fluid dynamicists because it consists of two coupled, interpenetrating turbulent fluids: the first is inviscid with quantized vorticity, and the second is viscous with continuous vorticity. Despite this double nature, the observe...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2014-03, Vol.111 (Supplement 1), p.4683-4690
Main Authors: Barenghi, Carlo F., L'vov, Victor S., Roche, Philippe-E.
Format: Article
Language:English
Subjects:
Condensed Matter
Energy spectrum
Engineering Sciences
Experiments
Flow velocity
Fluid Dynamics
Fluid mechanics
Fluids
Fluids mechanics
Helium
Hydrodynamics
Kelvin waves
Line spectra
Mechanics
Modeling
Other
Physical Sciences
Physics
Quantum physics
Reviews
SPECIAL FEATURE: REVIEW
Spectrum analysis
Turbulence
Velocity
Vorticity
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Summary:Turbulence in superfluid helium is unusual and presents a challenge to fluid dynamicists because it consists of two coupled, interpenetrating turbulent fluids: the first is inviscid with quantized vorticity, and the second is viscous with continuous vorticity. Despite this double nature, the observed spectra of the superfluid turbulent velocity at sufficiently large length scales are similar to those of ordinary turbulence. We present experimental, numerical, and theoretical results that explain these similarities, and illustrate the limits of our present understanding of superfluid turbulence at smaller scales.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1312548111