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Evolution of coupled Gaussian vortex systems in helium II

Lookup NU author(s): Dr Sola Idowu, Professor David Samuels

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Abstract

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.

Publication metadata

Author(s): Idowu OC, Samuels DC, Henderson KL

Publication type: Article

Publication status: Published

Journal: Physica B: Condensed Matter

Year: 2000

Volume: 284-288

Issue: I

Pages: 69-70

ISSN (print): 0921-4526

ISSN (electronic): 1873-2135

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/S0921-4526(99)02036-0

DOI: 10.1016/S0921-4526(99)02036-0

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