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 |
Keywords
- superfluid
- superfluid turbulence
- turbulence
- damping length
- viscous normal fluid
- nonzero temperatures
- superfluid vortex structures
- Reynolds number
- Kolmogorov
- superfluid energy structure