6533b853fe1ef96bd12ad2c6
RESEARCH PRODUCT
Flow of turbulent superfluid helium inside a porous medium
Lucia ArdizzoneGiuseppa GaetaMaria Stella Mongiovi'subject
fourth soundturbulent superfluidSettore MAT/05 - Analisi MatematicaTurbulent superfluid propagation waves porous mediumSettore MAT/07 - Fisica Matematicadescription
The work deals with further developments of a study previously initiated, in which a macroscopic model of inhomogeneous superfluid turbulence, based on extended thermodynamics, has been formulated. The model choose as fundamental fields, beside the traditional fields, two extra variables: the averaged vortex line length per unit volume and the heat flux. Using this model the propagation of the fourth sound inside a superleak is investigated: it is shown that, if the configuration of the vortex tangle inside the superleak are not altered -on the average- by the presence of the walls, when the fourth sound is propagated, vibrations in the vortex line density are present, too.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 |