Very fine structures in scalar mixing
Chaotic Dynamics
2009-11-11 v1 Astrophysics
Fluid Dynamics
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 is 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.
Cite
@article{arxiv.nlin/0502036,
title = {Very fine structures in scalar mixing},
author = {Joerg Schumacher and Katepalli R. Sreenivasan and Pui-kuen Yeung},
journal= {arXiv preprint arXiv:nlin/0502036},
year = {2009}
}
Comments
10 pages, 7 figures (low quality due to downsizing)