Geometric features of the mixing of passive scalars at high schmidt numbers

Jörg Schumacher, Katepalli R. Sreenivasan

Research output: Contribution to journalArticlepeer-review

Abstract

The mixing of passive scalars of decreasing diffusivity, advected in each case by the same three-dimensional Navier-Stokes turbulence, is studied. The mixing becomes more isotropic with decreasing diffusivity. The local flow in the vicinity of steepest negative and positive scalar gradients is in general different, and its behavior is studied for various values of the scalar diffusivity. Mixing approaches monofractal properties with diminishing diffusivity. We consider these results in the context of possible singularities of scalar dissipation.

Original languageEnglish (US)
JournalPhysical Review Letters
Volume91
Issue number17
DOIs
StatePublished - 2003

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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