The passive scalar spectrum and the Obukhov-Corrsin constant

Research output: Contribution to journalArticle

Abstract

It is pointed out that, for microscale Reynolds numbers less than about 1000, the passive scalar spectrum in turbulent shear flows is less steep than anticipated and that the Obukhov-Corrsin constant can be defined only if the microscale Reynolds number exceeds this value. In flows where the large-scale velocity field is essentially isotropic (as in grid turbulence), the expected 5/3 scaling is observed even at modest Reynolds numbers. All known data on the Obukhov-Corrsin constant are collected. The support for the notion of a "universal" constant is shown to be reasonable. Its value is about 0.4.

Original languageEnglish (US)
Pages (from-to)189-196
Number of pages8
JournalPhysics of Fluids
Volume8
Issue number1
StatePublished - Jan 1996

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Reynolds number
scalars
microbalances
Shear flow
shear flow
Turbulence
velocity distribution
turbulence
grids
scaling

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

The passive scalar spectrum and the Obukhov-Corrsin constant. / Sreenivasan, Katepalli R.

In: Physics of Fluids, Vol. 8, No. 1, 01.1996, p. 189-196.

Research output: Contribution to journalArticle

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