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Emission of discrete vortex rings by a vibrating grid in superfluid He-3-B : a precursor to quantum turbulence.

Bradley, D. Ian and Clubb, D. O. and Fisher, Shaun N. and Guénault, A.M. and Haley, Richard P. and Matthews, C. J. and Pickett, George R. and Tsepelin, Viktor and Zaki, K. (2005) Emission of discrete vortex rings by a vibrating grid in superfluid He-3-B : a precursor to quantum turbulence. Physical Review Letters, 95 (3). 035302. ISSN 1079-7114

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Abstract

We report a transition in the vorticity generated by a grid moving in the B phase of superfluid He-3 at T < T-c. The evolution of the vorticity after arresting the grid shows a dramatic change in the decay rate at a critical grid velocity. We believe this to reflect a sharp transition from ballistic vortex-ring production at low grid velocities to quantum turbulence at higher velocities and that independent isolated vortex rings provide the precursors to the developed turbulence. Furthermore we believe that this may be a feature of all quantum turbulence arising from repetitive mechanical agitation.

Item Type: Article
Journal or Publication Title: Physical Review Letters
Uncontrolled Keywords: VORTEX RINGS ; GRID ; SUPERFLUID ; TURBULENCE
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23485
Deposited By: Dr Richard P. Haley
Deposited On: 26 Jan 2009 09:34
Refereed?: Yes
Published?: Published
Last Modified: 17 Jul 2013 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23485

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