On the perseverance of a quasi-two-dimensional eddy-structure in a turbulent mixing layer

I. Wygnanski, D. Oster, H. Fiedler, B. Dziomba

Research output: Contribution to journalArticle

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Abstract

Strong external disturbances were introduced into a mixing layer in order to test the formation of the quasi two-dimensional coherent eddies and their survival under less than ideal conditions. Velocity and temperature correlation measurements, flow visualization, and the simultaneous use of a large number of sensors suggest that these eddies are very stable in the range of Reynolds numbers considered and they persevere in spite of the external buffeting imposed. Some measurements were carried out in a mixing layer between two parallel streams and some in a mixing layer entraining quiescent surrounding fluid. In both cases the large eddies could be described. as vortex rolls spanning the test section; these rolls may be contorted and sometimes skewed, but they are basically two-dimensional.

Original languageEnglish (US)
Pages (from-to)325-335
Number of pages11
JournalJournal of Fluid Mechanics
Volume93
Issue number2
DOIs
StatePublished - Jul 1979
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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