Velocity fluctuations in a turbulent soap film: The third moment in two dimensions

A. Belmonte, W. I. Goldburg, H. Kellay, M. A. Rutgers, B. Martin, X. L. Wu

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

Quasi-two-dimensional decaying turbulence is studied in a flowing soap film by measuring the moments of the probability density function P(δv(r)) for the longitudinal velocity differences δv(r) on a scale r. As in three-dimensional (3-D) turbulence, P becomes non-Gaussian with decreasing r. The third moment S 3 (r) ≡ 〈(δv(r)) 3 〉 is small and negative at small scales, but becomes positive at larger scales. The exact calculation of S 3 (r) for 2-D homogeneous isotropic turbulence relates this change in sign to the development of the velocity correlation function as the turbulence decays.

Original languageEnglish (US)
Pages (from-to)1196-1200
Number of pages5
JournalPhysics of Fluids
Volume11
Issue number5
DOIs
StatePublished - May 1999

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Velocity fluctuations in a turbulent soap film: The third moment in two dimensions'. Together they form a unique fingerprint.

  • Cite this

    Belmonte, A., Goldburg, W. I., Kellay, H., Rutgers, M. A., Martin, B., & Wu, X. L. (1999). Velocity fluctuations in a turbulent soap film: The third moment in two dimensions. Physics of Fluids, 11(5), 1196-1200. https://doi.org/10.1063/1.869891