Hydrodynamic modes of superfluid helium adsorbed on Nuclepore

Journal Article · Tue Apr 01 04:00:00 EST 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.33.4664· OSTI ID:6056701

Cohen, S M; Guyer, R A; Machta, J

A theory is presented to describe sound propagation in superfluid /sup 4/He adsorbed on Nuclepore, a planar porous substrate. The theory predicts the dependence of the sound velocity on film thickness. For thin films the sound speed is lower than on an equivalent nonporous substrate while for thick films the reverse holds. The transition between these regimes occurs when the fluid in the pores capillary condenses. The predictions of the theory are in qualitative agreement with the experimental results of Hallock and co-workers.

• Research Organization: Laboratory for Low Temperature Physics, University of Massachusetts, Amherst, Massachusetts 01003
• OSTI ID: 6056701
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 33:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
BLOOD VESSELS
BODY
CAPILLARIES
CARDIOVASCULAR SYSTEM
EVEN-EVEN NUCLEI
FILMS
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
NUCLEI
ORGANS
POROUS MATERIALS
QUANTUM FLUIDS
SORPTION
SOUND WAVES
STABLE ISOTOPES
SUPERFLUIDITY
VELOCITY