Hydrodynamics of Superfluid Helium in a Single Nanohole

Details Hydrodynamics of Superfluid Helium in a Single Nanohole Hydrodynamics of Superfluid Helium in a Single Nanohole

2011-10-05

arxiv.org/abs/1110.1088v1

Phys. Rev. Lett.107, 254501 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.107.254501

The flow of liquid helium through a single nanohole with radius smaller than 25 nm was studied for the first time. Mass flow was induced by applying a pressure difference of up to 1.4 bar across a 50 nm thick Si3N4 membrane and was measured directly by means of mass spectrometry. In liquid He I, we experimentally show that the fluid is not clamped by the short pipe with diameter-to-length ratio D/L~1, despite the small diameter of the nanohole. This viscous flow is quantitatively understood by making use of a model of flow in short pipes. In liquid He II, a two-fluid model for mass flow is used to extract the superfluid velocity in the nanohole for different pressure heads at temperatures close to the superfluid transition. These velocities compare well to existing data for the critical superflow of liquid helium in other confined systems.

Affiliated with

Also associated with

No associations

Rating

Hydrodynamics of Superfluid Helium in a Single Nanohole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hydrodynamics of Superfluid Helium in a Single Nanohole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamics of Superfluid Helium in a Single Nanohole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-180349