Decay of vorticity in homogeneous turbulence

Michael R. Smith, Russell J. Donnelly, Nigel D Goldenfeld, W. F. Vinen

Research output: Contribution to journalArticlepeer-review

Abstract

We report on observations of turbulent behavior made without requiring the use of Taylor's "frozen turbulence" hypothesis. Initially, a towed grid generates homogeneous turbulence of grid Reynolds number of order 105 within a stationary channel filled with helium II. The subsequent decay in time t of the line density of quantum vortices is measured by second sound attenuation, and the associated rms vorticity ω follows the behavior expected of a classical fluid with ω∼t-3/2, consistent with the notion of a coupled turbulent state of helium II. This technique also yields the time dependence of the Kolmogorov microscale.

Original languageEnglish (US)
Pages (from-to)2583-2586
Number of pages4
JournalPhysical review letters
Volume71
Issue number16
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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