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The mixing transition in turbulent flows

Published online by Cambridge University Press:  25 April 2000

PAUL E. DIMOTAKIS
PAUL E. DIMOTAKIS
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, CA 91125, USA
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Abstract

Data on turbulent mixing and other turbulent-flow phenomena suggest that a (mixing) transition, originally documented to occur in shear layers, also occurs in jets, as well as in other flows and may be regarded as a universal phenomenon of turbulence. The resulting fully-developed turbulent flow requires an outer-scale Reynolds number of Re = Uδ/v [gsim ] 1–2 × 104, or a Taylor Reynolds number of ReT = u′ λT/v [gsim ] 100–140, to be sustained. A proposal based on the relative magnitude of dimensional spatial scales is offered to explain this behaviour.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 409 , 25 April 2000 , pp. 69 - 98
Copyright
© 2000 Cambridge University Press

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