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Investigations of second sound Helmholtz oscillation and the superfluid turbulence in a helium II thermal counterflow jet.

[In Japanese. / En japonais.]

Author(s) : NAKANO A., MURAKAMI M.

Type of article: Article

Summary

A laser Doppler velocimeter was applied to the measurement of thermal counterflow jet in helium II. The normal fluid jet seems to entrain the surrounding superfluid, which results in the zero relative velocity of two fluid even very close to the nozzle exit. The second sound Helmholtz oscillation measurement is of use as a diagnosis for superfluid turbulent state. The frequency and the decay of the oscillation were investigated. It is also suggested that a weak superfluid turbulent state may exist in small heat input case. In large heat input case, the turbulent state was identified as the Gorter-Mellink type superfluid turbulent state.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-2046
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 28 - n. 3
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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