Third-sound velocity in thin /sup 3/He-/sup 4/He mixture films

Journal Article · Tue Jul 01 04:00:00 EDT 1980 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.22.180· OSTI ID:5208254

Dandache, H; Zoaeter, M; Laheurte, J P; Noiray, J C; Romagnan, J P

The linearized hydrodynamics equations for a flat superfluid /sup 3/He-/sup 4/He mixture film are derived. It is more complex than in pure /sup 4/He film: there is one new variable, the concentration of which presents spatial variations near the substrate walls. Interactions of the film with the gas and substrate are included. An approximate solution for the third-sound velocity is then obtained for thin films in the low-frequency limit, neglecting dissipation due to vortex motion. This solution, as for /sup 4/He, should be useful for any analysis of third-sound experiments in mixture films.

• Research Organization: Universite libanaise de Beyrouth, Hadathe, Liban
• OSTI ID: 5208254
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 22:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FILMS
FLUID MECHANICS
FLUIDS
HELIUM 3
HELIUM 4
HELIUM II
HELIUM ISOTOPES
HYDRODYNAMICS
ISOTOPES
LIGHT NUCLEI
MECHANICS
MIXTURES
NUCLEI
QUANTUM FLUIDS
STABLE ISOTOPES
THIRD SOUND
VELOCITY