Phase decorrelation of coherent structures in a free shear layer

Chih Ming Ho, Yitshak Zohar, Judith K. Foss, Jeffrey C. Buell

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The vortices near the origin of an initially laminar mixing layer have a single frequency with a well-defined phase; i.e. there is little phase jitter. Further downstream, however, the phase jitter increases suddenly. Even when the flow is forced, this same transition is observed. The forcing partially loses its influence because of the decorrelation of the phase between the forcing signal and the passing coherent structures. In the present investigation, this phenomenon is documented and the physical mechanism responsible for the phase decorrelation is identified.

Original languageEnglish (US)
Pages (from-to)319-337
Number of pages19
JournalJournal of Fluid Mechanics
Volume230
StatePublished - Sep 1991
Externally publishedYes

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shear layers
Jitter
laminar mixing
vibration
Vortex flow
vortices

ASJC Scopus subject areas

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

Cite this

Phase decorrelation of coherent structures in a free shear layer. / Ho, Chih Ming; Zohar, Yitshak; Foss, Judith K.; Buell, Jeffrey C.

In: Journal of Fluid Mechanics, Vol. 230, 09.1991, p. 319-337.

Research output: Contribution to journalArticle

Ho, Chih Ming ; Zohar, Yitshak ; Foss, Judith K. ; Buell, Jeffrey C. / Phase decorrelation of coherent structures in a free shear layer. In: Journal of Fluid Mechanics. 1991 ; Vol. 230. pp. 319-337.
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