Porous-membrane second-sound transducers for superfluid UHe

Journal Article · Tue Dec 31 23:00:00 EST 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.139· OSTI ID:6327397

Zimmermann, W Jr

A systematic analysis of porous-membrane second-sound transducers for superfluid UHe is presented, based on the case of two transducers, one serving as generator, the other as detector, situated at opposite ends of a resonant cavity. Included in the analysis are the effects of viscous slip of the normal-fluid component in the pores of the membrane and the effects of the inertia of the fluid in the pores. The transducers are found to obey reciprocity relations connecting their efficiencies as generators and as detectors, for both first and second sound. The results are illustrated by numerical calculations for representative cases as functions of temperature and frequency.

• Research Organization: Tate Laboratory of Physics, University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 6327397
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAVITY RESONATORS
ELECTRONIC EQUIPMENT
EQUIPMENT
EVEN-EVEN NUCLEI
FLUIDS
FREQUENCY DEPENDENCE
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
MEMBRANES
NUCLEI
NUMERICAL SOLUTION
POROUS MATERIALS
QUANTUM FLUIDS
RESONATORS
SECOND SOUND
SOUND WAVES
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TRANSDUCERS
VISCOSITY