NDLI: Propagation of a Turbulent Fronts in Quantum Fluids

Content Provider	Springer Nature Link
Author	Nemirovskii, Sergey K.
Copyright Year	2010
Abstract	This paper is part of our series of studies on the dynamics of inhomogeneous vortex tangles. We consider here the motion of turbulent fronts. There are a number of experiments in which the authors observed the development of superfluid turbulence in quantum fluids in the form of propagating fronts. There are also experiments in which the authors observed the appearance of the moving structures (“plugs”), regions with the high vortex line density in the counterflowing superfluid helium. These phenomena have both scientific and applied interest. For example, the possibility of spontaneous formation of “plugs” can radically affect heat transfer in channels with superfluid helium, which is used as a refrigerant for cooling superconducting devices. There are a number of hypotheses for how the fronts and “plugs” appear and what their dynamics are, in particular, how to evaluate the velocity of propagations. In the present work we elaborate the approach of the combustion-like propagation of the superfluid turbulent domain. A key assumption is that propagation of the front occurs in diffusion manner of diffusion with the source of the vortices behind the front, just like the combustion process. Additionally, there is a drift motion of the vortex tangles due to polarization of the vortex loops. Interplay of these effects determines the speed of the turbulent front propagation. We performed a comparison with the experimental data.
Starting Page	347
Ending Page	353
Page Count	7
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	162
Issue Number	3-4
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2010-10-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Superfluid turbulence Quantum vortices Nonuniform vortex tangle Magnetism, Magnetic Materials Characterization and Evaluation of Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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