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Lookup NU author(s): Dr David Samuels, Dr Demosthenes Kivotides
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We show that a damping length scale ℓsd exists for superfluid turbulence at nonzero temperatures, where the superfluid component is coupled by mutual friction to a viscous normal fluid. Superfluid vortex structures at length scales smaller than ℓsd will lose energy to the normal fluid and will be dissipated. We derive the Reynolds-number dependence of this length scale and discuss the consequences of this length scale for the possible existence of a Kolmogorov - 5/3 power law for the superfluid energy spectrum.
Author(s): Samuels DC, Kivotides D
Publication type: Article
Publication status: Published
Journal: Physical Review Letters
Year: 1999
Volume: 83
Issue: 25
Pages: 5306-5309
Print publication date: 20/12/1999
ISSN (print): 0031-9007
ISSN (electronic): 1079-7114
Publisher: American Physical Society
URL: http://dx.doi.org/10.1103/PhysRevLett.83.5306
DOI: 10.1103/PhysRevLett.83.5306
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