What question did this study set out to answer?

To explain how turbulence in the superfluid phase of liquid helium-4 exhibits characteristics comparable to conventional fluid turbulence and determine the mechanisms governing energy dissipation across scales.

January 1, 2000Physical review. B, Condensed matter

Classical character of turbulence in a quantum liquid

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WVW. F. VinenUniversity of Birmingham

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Implication

Theoretical analysis demonstrates classical-like turbulent behavior across coupled fluid components in superfluid helium-4, suggesting shared energy dissipation mechanisms across large scales.

Key Points

To explain how turbulence in the superfluid phase of liquid helium-4 exhibits characteristics comparable to conventional fluid turbulence and determine the mechanisms governing energy dissipation across scales.
Evaluated experimental observations of decaying grid turbulence in superfluid helium-4.
Analyzed dynamic coupling between the turbulent superfluid component and the viscous normal fluid across varying length scales.
Modeled energy dissipation pathways including normal fluid viscosity, mutual friction against vortex lines, sound radiation, and pure superfluid decay at ultra-low temperatures.
Normal and superfluid components lock together at length scales exceeding vortex line spacing and viscous dissipation limits, causing the two-fluid system to behave as a single classical fluid.
Energy dissipation on smaller scales proceeds through normal fluid viscosity, friction along quantized vortex lines, and acoustic radiation, yielding a decay rate expression qualitatively parallel to classical fluids.
Turbulence decay in the ultra-low temperature limit without normal fluid is predicted to proceed via purely quantum vortex line interactions and sound emission.

Cite This Study

W. F. Vinen (2000) studied this question.

synapsesocial.com/papers/6a979950a9054fc672c60c7c https://doi.org/10.1103/physrevb.61.1410

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Implication

Theoretical analysis demonstrates classical-like turbulent behavior across coupled fluid components in superfluid helium-4, suggesting shared energy dissipation mechanisms across large scales.

Classical character of turbulence in a quantum liquid

Discussion

Member takes

Implication

Key Points

Cite This Study

Classical character of turbulence in a quantum liquid

Discussion

Member takes

Implication

Key Points

Cite This Study

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