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Coupled Dynamics for Superfluid $$^4\hbox {He}$$ 4 He in a Channel

Coupled Dynamics for Superfluid $$^4\hbox {He}$$ 4 He in a Channel We study the coupled dynamics of normal and superfluid components of superfluid $$^4\hbox {He}$$ 4 He in a 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 where 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 the two components is taken into account. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Coupled Dynamics for Superfluid $$^4\hbox {He}$$ 4 He in a Channel

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References (26)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Springer Science+Business Media New York
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/s10909-016-1718-2
Publisher site
See Article on Publisher Site

Abstract

We study the coupled dynamics of normal and superfluid components of superfluid $$^4\hbox {He}$$ 4 He in a 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 where 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 the two components is taken into account.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Nov 29, 2016

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