Nonequilibrium thermodynamics of unsteady superfluid turbulence in counterflow and rotating situations

Journal Article · Sat Oct 01 04:00:00 EDT 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.144517· OSTI ID:20719619

Jou, D ^[1]; Mongiovi, M S ^[2]

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1. Departament de Fisica, Universitat Autonoma de Barcelona 08193 Bellaterra, Catalonia (Spain)
2. Dipartimento di Metodi e Modelli Matematici, Universita di Palermo c/o Facolta di Ingegneria, Viale delle Scienze, 90128, Palermo (Italy)

The methods of nonequilibrium thermodynamics are used in this paper to relate an evolution equation for the vortex line density L, describing superfluid turbulence in the simultaneous presence of counterflow and rotation, to an evolution equation for the superfluid velocity v{sub s}, in order to be able to describe the full evolution of v{sub s} and L, instead of only L. Two alternative possibilities are analyzed, related to two possible alternative interpretations of a term coupling the effects of the counterflow and rotation on the vortex tangle, and which imply some differences between situations where counterflow and rotation vectors are parallel or orthogonal to each other. One arrives to a modified Gorter-Mellink equation with new terms dependent on the angular speed. Finally, two proposals to describe the effects of anisotropy of the vortex tangle on the dynamical equations for v{sub s} and L are examined.

• OSTI ID: 20719619
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 14 Vol. 72; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COUPLING
DENSITY
ROTATION
SUPERFLUIDITY
THERMODYNAMICS
TURBULENCE
VORTICES