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Lookup NU author(s): Dr Sola Idowu,
Professor David Samuels
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We have investigated the evolution of the normal and superfluid flow in helium II using the two-fluid Hall-Vinen-Bekharevich-Khalatnikov equations. We found that closely matched Gaussian vorticity distributions form in both the superfluid and the normal fluid and decay together with a viscous time scale that is set by the total fluid density and not by the density of the normal fluid alone. This calculation suggests that the normal fluid and superfluid can have velocity fields which are strongly coupled together so that the two fluids behave as a single fluid.
Author(s): Idowu OC, Samuels DC, Henderson KL
Publication type: Article
Publication status: Published
Journal: Physica B: Condensed Matter
ISSN (print): 0921-4526
ISSN (electronic): 1873-2135
Publisher: Elsevier BV
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