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Nonlinear Sciences > Chaotic Dynamics

arXiv:nlin/0309010 (nlin)
[Submitted on 4 Sep 2003]

Title:Geometric features of the mixing of passive scalars at high Schmidt numbers

Authors:Joerg Schumacher, Katepalli R. Sreenivasan
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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 are 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.
Comments: 4 pages, 5 Postscript figures
Subjects: Chaotic Dynamics (nlin.CD); Astrophysics (astro-ph); Fluid Dynamics (physics.flu-dyn)
Cite as: arXiv:nlin/0309010 [nlin.CD]
  (or arXiv:nlin/0309010v1 [nlin.CD] for this version)
  https://doi.org/10.48550/arXiv.nlin/0309010
Journal reference: Phys.Rev.Lett. 91 (2003) 174501
Related DOI: https://doi.org/10.1103/PhysRevLett.91.174501

Submission history

From: Joerg Schumacher [view email]
[v1] Thu, 4 Sep 2003 09:52:43 UTC (164 KB)
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