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Experimental, numerical, and analytical velocity spectra in turbulent quantum fluid

Lookup NU author(s): Professor Carlo Barenghi

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Abstract

Turbulence in superfluid helium is unusual and presents a challenge to fluid dynamicists because it consists of two coupled, interpenetrating turbulent fluids: the first is inviscid with quantized vorticity, and the second is viscous with continuous vorticity. Despite this double nature, the observed spectra of the superfluid turbulent velocity at sufficiently large length scales are similar to those of ordinary turbulence. We present experimental, numerical, and theoretical results that explain these similarities, and illustrate the limits of our present understanding of superfluid turbulence at smaller scales.

Publication metadata

Author(s): Barenghi CF, L'vov VS, Roche PE

Publication type: Review

Publication status: Published

Journal: Proceedings of the National Academy of Sciences of the USA

Year: 2014

Volume: 111

Issue: Suppl. 1

Pages: 4683-4690

Print publication date: 25/03/2014

Online publication date: 25/03/2014

Acceptance date: 18/02/2014

ISSN (print): 0027-8424

ISSN (electronic): 1091-6490

Publisher: NATL ACAD SCIENCES

URL: http://dx.doi.org/10.1073/pnas.1312548111

DOI: 10.1073/pnas.1312548111

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