Properties of superfluid fog
Department of Physics and Astronomy, University of
California Los Angeles, CA 90095 USA
Corresponding author: firstname.lastname@example.org
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