Very fine structures in scalar mixing

J. Schumacher, K. R. Sreenivasan, P. K. Yeung

Research output: Contribution to journalArticle

Abstract

We explore very fine scales of scalar dissipation in turbulent mixing, below Kolmogorov and around Batchelor scales, by performing direct numerical simulations at much finer grid resolution than was usually adopted in the past. We consider the resolution in terms of a local fluctuating Batchelor scale and study the effects on the tails of the probability density function and multifractal properties of the scalar dissipation. The origin and importance of these very fine-scale fluctuations are discussed. One conclusion is that they are unlikely to be related to the most intense dissipation events.

Original languageEnglish (US)
Pages (from-to)113-122
Number of pages10
JournalJournal of Fluid Mechanics
Volume531
DOIs
StatePublished - May 25 2005

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Direct numerical simulation
Probability density function
fine structure
scalars
dissipation
turbulent mixing
probability density functions
direct numerical simulation
grids

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Very fine structures in scalar mixing. / Schumacher, J.; Sreenivasan, K. R.; Yeung, P. K.

In: Journal of Fluid Mechanics, Vol. 531, 25.05.2005, p. 113-122.

Research output: Contribution to journalArticle

Schumacher, J. ; Sreenivasan, K. R. ; Yeung, P. K. / Very fine structures in scalar mixing. In: Journal of Fluid Mechanics. 2005 ; Vol. 531. pp. 113-122.
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