Coupled dynamics for superfluid ${}^4$He in the channel

Abstract

We study the coupled dynamics of normal and superfluid components of the superfluid ${}^4$He in the channel considering the counterflow turbulence with laminar normal component. In particular, we calculated profiles of the normal velocity, the mutual friction, the vortex line density and other flow properties and compared them to the case when the dynamic of the normal component is "frozen". We have found that the coupling between the normal and superfluid components leads to flattening of the normal velocity profile, increasingly more pronounced with temperature, as the mutual friction, and therefore coupling, becomes stronger. The commonly measured flow properties also change when the coupling between two components is taken into account.

References in corpus (10)

• Introduction to quantum turbulence
• Visualization of the normal-fluid turbulence in counterflowing superfluid 4He
• Spectrum of turbulent Kelvin-waves cascade in superfluid helium
• Structure of quantum vortex tangle in He-4 counterflow turbulence
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• Dynamics of the Density of Quantized Vortex-Lines in Superfluid Turbulence
• Counterflow quantum turbulence of He II in a square channel: Numerical analysis with nonuniform flows of the normal fluid
• Thermal counterflow in a periodic channel with solid boundaries
• Coupled normal fluid and superfluid profiles of turbulent helium II in channels
• Mechanical momentum transfer in wall-bounded superfluid turbulence

Cited by in corpus (5)

• Numerical Studies of Quantum Turbulence
• Fully Coupled Two-Fluid Dynamics in Superfluid ${}^4$He: Anomalous Anisotropic Velocity Fluctuations in Counterflow
• Three-Dimensional Coupled Dynamics of Two-Fluid Model in Superfluid ${}^4$He: Deformed Velocity Profile of Normal Fluid in Thermal Counterflow
• Spherically symmetric formation of localized vortex tangle around a heat source in superfluid ${}^4$He
• Dynamics of turbulent plugs in a superfluid ${}^4$He channel counterflow