High-Reynolds-number simulation of turbulent mixing

P. K. Yeung, D. A. Donzis, K. R. Sreenivasan

Research output: Contribution to journalArticle

Abstract

A brief report is given of a new 20483 direct numerical simulation of the mixing of passive scalars with uniform mean gradients in forced, stationary isotropic turbulence. The Taylor-scale Reynolds number is close to 700 and Schmidt numbers of 1 and 1/8 are considered. The data provide the most convincing evidence to date for the inertial-convective scaling. Significant departures from small-scale isotropy are sustained in conventional measures. Subject to some stringent resolution requirements, the data suggest that commonly observed differences between the intermittency of energy and scalar dissipation rates may in part be a finite-Reynolds-number effect.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalPhysics of Fluids
Volume17
Issue number8
DOIs
StatePublished - Aug 2005

Fingerprint

turbulent mixing
high Reynolds number
Reynolds number
scalars
Schmidt number
isotropic turbulence
Direct numerical simulation
isotropy
intermittency
direct numerical simulation
Turbulence
dissipation
simulation
energy dissipation
scaling
gradients
requirements

ASJC Scopus subject areas

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

Cite this

High-Reynolds-number simulation of turbulent mixing. / Yeung, P. K.; Donzis, D. A.; Sreenivasan, K. R.

In: Physics of Fluids, Vol. 17, No. 8, 08.2005, p. 1-4.

Research output: Contribution to journalArticle

Yeung, P. K. ; Donzis, D. A. ; Sreenivasan, K. R. / High-Reynolds-number simulation of turbulent mixing. In: Physics of Fluids. 2005 ; Vol. 17, No. 8. pp. 1-4.
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