MEASUREMENTS OF ENTRAINMENT AND MIXING IN TURBULENT JETS.

Werner Dahm, P. E. Dimotakis

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

Entrainment and mixing were investigated in the self-similar far field of a steady, axisymmetric, momentum-driven, free turbulent jet in water. High-resolution laser-induced fluorescence techniques were used to measure the time-varying jet fluid concentration field. Results show that the entrainment and mixing processes in the jet display a roughly periodic organization characterized by temporal and spatial scales approximately equal to the local large scales of the flow. It is found that instantaneous radial profiles of the jet fluid concentration do not resemble the mean profile, indicating that the mean profile is a poor representation of the mixed fluid states in the jet. The instantaneous profiles show that unmixed ambient fluid is transported deep into the jet, and that the mixed fluid composition can be fairly uniform within large regions.

Original languageEnglish (US)
Pages (from-to)1216-1223
Number of pages8
JournalAIAA Journal
Volume25
Issue number9
StatePublished - Sep 1987
Externally publishedYes

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Fluids
Momentum
Fluorescence
Lasers
Chemical analysis
Water

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

MEASUREMENTS OF ENTRAINMENT AND MIXING IN TURBULENT JETS. / Dahm, Werner; Dimotakis, P. E.

In: AIAA Journal, Vol. 25, No. 9, 09.1987, p. 1216-1223.

Research output: Contribution to journalArticle

Dahm, W & Dimotakis, PE 1987, 'MEASUREMENTS OF ENTRAINMENT AND MIXING IN TURBULENT JETS.', AIAA Journal, vol. 25, no. 9, pp. 1216-1223.
Dahm, Werner ; Dimotakis, P. E. / MEASUREMENTS OF ENTRAINMENT AND MIXING IN TURBULENT JETS. In: AIAA Journal. 1987 ; Vol. 25, No. 9. pp. 1216-1223.
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