Mutual-friction induced instability of normal-fluid vortex tubes in superfluid helium-4

Kivotides, Demosthenes (2018) Mutual-friction induced instability of normal-fluid vortex tubes in superfluid helium-4. Physics Letters A, 382 (22). pp. 1481-1485. ISSN 0375-9601

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    Abstract

    It is shown that, as a result of its interactions with superfluid vorticity, a normal-fluid vortex tube in helium-4 becomes unstable and disintegrates. The superfluid vorticity acquires only a small (few percents of normal-fluid tube strength) polarization, whilst expanding in a front-like manner in the intervortex space of the normal-fluid, forming a dense, unstructured tangle in the process. The accompanied energy spectra scalings offer a structural explanation of analogous scalings in fully developed finite-temperature superfluid turbulence. A macroscopic mutual-friction model incorporating these findings is proposed.

    • Item type:Article
      ID code:63691
      Dates:
      Date
      Event
      5 June 2018
      Published
      4 April 2018
      Published Online
      31 March 2018
      Accepted
      Keywords:turbulence, vortices, computation, Physics, Physics and Astronomy(all)
      Subjects:Science > Physics
      Department:Faculty of Engineering > Chemical and Process Engineering
      Depositing user: Pure Administrator
      Date deposited:11 Apr 2018 15:13
      Last modified:29 Nov 2021 02:04
      Related URLs:
      URI:https://strathprints.strath.ac.uk/id/eprint/63691
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