Triple Vortex Ring Structure in Superfluid Helium II
Abstract
Superfluids such as helium II consist of two interpenetrating fluids: the normal fluid and the superfluid. The helium II vortex ring has generally been considered merely as a superfluid object, neglecting any associated motion of the normal fluid. We report a three-dimensional calculation of the coupled motion of the normal-fluid and superfluid components, which shows that the helium II vortex ring consists of a superfluid vortex ring accompanied by two coaxial normal-fluid vortex rings of opposite polarity. The three vortex rings form a coherent, dissipative structure.
- Publication:
-
Science
- Pub Date:
- October 2000
- DOI:
- 10.1126/science.290.5492.777
- Bibcode:
- 2000Sci...290..777K
- Keywords:
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- PHYSICS