Superfluid turbulence in counterflow and pure superflow

Tough, J. T.; Ashton, R.A.; Opatowsky, L. B.

doi:10.1016/0378-4363(81)90864-0

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…The importance of this result stems from the belief that the dynamical state of the normal fluid accounts for the significant observed differences between pure superflow and thermal counterflow. 21,22,30,31 Finally, we show that our prediction can be easily tested using existing flow visualization based on solid hydrogen and deuterium tracer particles. 13,32,33…”

Section: Introductionmentioning

confidence: 96%

Large-scale normal fluid circulation in helium superflows

2017

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We perform fully coupled numerical simulations of helium II pure superflows in a channel, with vortex-line\ud density typical of experiments. Peculiar to our model is the computation of the back-reaction of the superfluid\ud vortex motion on the normal fluid and the presence of solid boundaries.We recover the uniform vortex-line density\ud experimentally measured employing second sound resonators and we show that pure superflow in helium II is\ud associated with a large-scale circulation of the normal fluid which can be detected using existing particle-tracking\ud visualization techniques

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Section: Introductionmentioning

confidence: 96%

Large-scale normal fluid circulation in helium superflows

2017

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On Flow of He II in Channels with Ends Blocked by Superleaks

Chagovets

Skrbek

2008

J Low Temp Phys

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Steady and Decaying Flow of He II in a Channel with Ends Blocked by Superleaks

Chagovets

Skrbek

2008

Phys. Rev. Lett.

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We report a new thermally generated steady-state flow of He II and its decay. An upward superflow through vertical channels of a square cross section with ends blocked by sintered silver superleaks is induced by a fountain pump. On increasing the heat power Q[over ] a vortex-free superflow and, above an intrinsic critical velocity of about 1.5 cm/s, two distinctly different turbulent steady-state flows characterized by the vortex line density L proportional, variantQ[over ];{2} and L proportional, variantQ[over ] are observed using the second sound attenuation technique. When Q[over ] is switched off, after a fast initial decay an exponential decay law is observed. A simple phenomenological model is introduced, capturing the observed features.

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Superfluid turbulence in counterflow and pure superflow

Cited by 3 publications

References 9 publications

Large-scale normal fluid circulation in helium superflows

Large-scale normal fluid circulation in helium superflows

On Flow of He II in Channels with Ends Blocked by Superleaks

Steady and Decaying Flow of He II in a Channel with Ends Blocked by Superleaks

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