LARGE-SCALE STRUCTURES IN A FORCED TURBULENT MIXING LAYER.

M. Gaster, E. Kit, Israel J Wygnanski

Research output: Contribution to journalArticle

208 Citations (Scopus)

Abstract

The large-scale structures that occur at moderately high Reynolds numbers have been modelled by linear inviscid stability theory incorporating first-order corrections for slow spatial variations of the mean flow. The perturbation stream function for a spatially growing time-periodic travelling wave has been numerically evaluated for the measured linearly diverging mean flow. In an accompanying experiment periodic oscillations were imposed on the turbulent mixing layer by the motion of a small flap at the trailing edge of the splitter plate that separated the two uniform streams of different velocity. The results of the numerical computations are compared with experimental measurements. For comparisons made on a purely local basis, agreement in both the amplitude and phase distribution across the mixing layer is excellent. Comparisons on a global scale revealed, less accuracy.

Original languageEnglish (US)
Pages (from-to)23-39
Number of pages17
JournalJournal of Fluid Mechanics
Volume150
StatePublished - Jan 1985
Externally publishedYes

Fingerprint

turbulent mixing
trailing edges
high Reynolds number
traveling waves
Reynolds number
perturbation
oscillations
Experiments

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

LARGE-SCALE STRUCTURES IN A FORCED TURBULENT MIXING LAYER. / Gaster, M.; Kit, E.; Wygnanski, Israel J.

In: Journal of Fluid Mechanics, Vol. 150, 01.1985, p. 23-39.

Research output: Contribution to journalArticle

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