| Issue |
Europhys. Lett.
Volume 58, Number 3, May 2002
|
|
|---|---|---|
| Page(s) | 395 - 400 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00652-0 | |
| Published online | 01 August 2002 | |
Properties of superfluid fog
Department of Physics and Astronomy, University of
California Los Angeles, CA 90095 USA
Corresponding author: gaw@ucla.edu
Received:
11
December
2001
Accepted:
3
January
2002
A dense fog consisting of superfluid 
droplets can
be generated in helium vapor up to a height of 4–6
from
the helium surface by driving a piezo transducer plate immersed
under the liquid. The average droplet size ranges from about
100
at a drive frequency of 1
to 10 at
100, and the frequency dependence is consistent with the
capillary-wave dispersion relation of the helium surface, with the
droplets ejected from the surface being about one wavelength in
diameter. It appears that the helium vapor is set into motion
along with the droplets, greatly reducing the viscous drag on the
droplets and making possible the substantial fog heights above the
surface.
PACS: 67.90.+z – Other topics in quantum fluids and solids; liquid and solid helium / 47.55.Dz – Drops and bubbles / 68.03.Kn – Dynamics (capillary waves)
© EDP Sciences, 2002
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