Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 5306-5309 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 83 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - 20 Dec 1999 |
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Keywords
- superfluid
- superfluid turbulence
- turbulence
- damping length
- viscous normal fluid
- nonzero temperatures
- superfluid vortex structures
- Reynolds number
- Kolmogorov
- superfluid energy structure
Cite this
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A damping length scale for superfluid turbulence. / Samuels, David C.; Kivotides, Demosthenes.
In: Physical Review Letters, Vol. 83, No. 25, 20.12.1999, p. 5306-5309.Research output: Contribution to journal › Article
TY - JOUR
T1 - A damping length scale for superfluid turbulence
AU - Samuels, David C.
AU - Kivotides, Demosthenes
PY - 1999/12/20
Y1 - 1999/12/20
N2 - 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.
AB - 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.
KW - superfluid
KW - superfluid turbulence
KW - turbulence
KW - damping length
KW - viscous normal fluid
KW - nonzero temperatures
KW - superfluid vortex structures
KW - Reynolds number
KW - Kolmogorov
KW - superfluid energy structure
UR - http://www.scopus.com/inward/record.url?scp=0000980192&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.83.5306
DO - 10.1103/PhysRevLett.83.5306
M3 - Article
VL - 83
SP - 5306
EP - 5309
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
ER -