Triple vortex ring structure in superfluid helium II.
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.
Kivotides
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Mathematics Department, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK.
Barenghi
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Samuels
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