The universal nature of zero-crossing time and velocity scales in turbulent shear flows

Promode Bandyopadhyay, A. K.M.F. Hussain

Research output: Contribution to journalArticle

Abstract

Recent studies have shown that the turbulence production process in shear flows is not entirely random, but rather quasiperiodic in nature. Since the large eddies play a decisive role in these processes in all shear flows, it is instructive to see if they bear any common characteristics. The possible universal distributions of time and velocity scales (T,u//p) in the low-frequency component of the turbulent signals - defined, respectively, as the interval between successive zero crossings and the intervening absolute peak value of the longitudinal velocity signal - have been explored in a number of flows. These include the self-preserving regions of a turbulent boundary layer, plane jet, circular jet, and plane mixing layer and the initial mixing regions of a plane jet and circular jet.

Original languageEnglish (US)
Pages (from-to)161-162
Number of pages2
JournalAIAA Journal
Volume23
Issue number2
DOIs
StatePublished - Feb 1985

ASJC Scopus subject areas

  • Aerospace Engineering

Fingerprint Dive into the research topics of 'The universal nature of zero-crossing time and velocity scales in turbulent shear flows'. Together they form a unique fingerprint.

Cite this