Critical Velocities in Superfluid Helium Flow Through 10-μm-Diameter Pinholes
- 11 October 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 27 (15), 977-979
- https://doi.org/10.1103/physrevlett.27.977
Abstract
The dissipation mechanism which usually limits superfluid flow to about 30 cm/sec in large pinholes is found to be suppressed by compressed-rouge superfluid filters placed in the flow path on each side of the orifice. The much larger "intrinsic" critical velocity is then observed for the first time in "large" channels.Keywords
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