Large-scale effects incorporated into free-shear layer calculations by using non-linear stability principles

Document Type

Conference Proceeding

Publication Date

12-1-1993

Abstract

A comprehensive model for the turbulent free shear-layer, including effects of the large-scale structure is presented. The flow is decomposed into a mean component, small scale random turbulence and a wave component representing the large-scale coherent structure. Equations for all components are derived by using time and phase averaging. The mean flow is determined from the classical boundary layer equations including interaction terms with the wave-like large-scale structure. A traditional two-equation turbulence model, modified to include large-scale structure effects, is used for the determination of the small-scale turbulent stress.

Publication Source (Journal or Book title)

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

First Page

49

Last Page

55

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