Measurement of the normal-fluid velocity in superfluids

Demosthenes Kivotides, Carlo F. Barenghi, Yuri A. Sergeev

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Numerical calculations of (finite temperature) superfluid vortex ring propagation against a particulate sheet show that the solid particle trajectories collapse to a very good approximation to the normal-fluid path lines. We propose an experiment in which, by measuring the solid particles' velocities, direct information about the instantaneous normal-fluid velocity values could be obtained.
Original languageEnglish
Article number215302
Number of pages4
JournalPhysical Review Letters
Issue number21
Publication statusPublished - 17 Nov 2005


  • finite temperature
  • normal-fluid velocity
  • solid particle trajectories
  • superfluids
  • approximation theory
  • fluid dynamics
  • numerical methods
  • thermal effects
  • velocity measurement
  • supercritical fluids

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