Fluctuations and correlations of pure quantum turbulence in superfluid He-3_B.

Bradley, D. Ian and Fisher, Shaun N. and Guénault, A.M. and Haley, Richard P. and O'Sullivan, Samantha and Pickett, George R. and Tsepelin, Viktor (2008) Fluctuations and correlations of pure quantum turbulence in superfluid He-3_B. Physical review letters, 101 (6). 065302. ISSN 1079-7114

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Abstract

We describe the first measurements of line-density fluctuations and spatial correlations of quantum turbulence in superfluid He-3-B. All of the measurements are performed in the low-temperature regime, where the normal-fluid density is negligible. The quantum turbulence is generated by a vibrating grid. The vortex-line density is found to have large length-scale correlations, indicating large-scale collective motion of vortices. Furthermore, we find that the power spectrum of fluctuations versus frequency obeys a -5/3 power law which verifies recent speculations that this behavior is a generic feature of fully developed quantum turbulence, reminiscent of the Kolmogorov spectrum for velocity fluctuations in classical turbulence.

Item Type: Journal Article
Journal or Publication Title: Physical review letters
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 23455
Deposited By: Dr Richard P. Haley
Deposited On: 19 Jan 2009 09:50
Refereed?: Yes
Published?: Published
Last Modified: 22 Jun 2019 02:24
URI: https://eprints.lancs.ac.uk/id/eprint/23455

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