Accession Number : ADP000332

Title :   On the Large Scale Structure of Turbulence in Boundary Layer and Shear Flows,


Personal Author(s) : Narayanan,M. A. Badri

Report Date : JUN 1982

Pagination or Media Count : 21

Abstract : The basic understanding of the physics of turbulence has undergone many radical changes in the last few years. Turbulent fluctuations which were considered to be purely random in nature is no more accepted to behave in that fashion but made up of somewhat coherent and orderly structures mixed with noise like random disturbances. The major difficulty experienced in the experimental investigations is the identification of these coherent structures from the overall signal. New methods are being developed to identify them. These orderly motions are large in scale and seem to play an important role in the dynamics of the mixing and the transport processes which are the essential features of turbulence. In this paper the properties of the large scale fluctuations in boundary layers as well as in shear flows are discussed. (Author)

Descriptors :   *Turbulent boundary layer, *Turbulent flow, *Shear properties, *Variations, Coherence, Dynamics, Mixing, Predictions

Distribution Statement : APPROVED FOR PUBLIC RELEASE