In this Letter we show that a recent hydrodynamical model of superfluid turbulence describes vortex density waves and their effects on the speed of high-frequency second sound. In this frequency regime, the vortex dynamics is not purely diffusive, as for low frequencies, but exhibits ondulatory features, whose influence on the second sound is here explored. © 2007 Elsevier B.V. All rights reserved.
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - 13 Aug 2007|
- Liquid helium II
- Non-equilibrium thermodynamics
- Superfluid turbulence