Universal decay of scalar turbulence
混沌动力学
2009-10-31 v1 统计力学
摘要
The asymptotic decay of passive scalar fields is solved analytically for the Kraichnan model, where the velocity has a short correlation time. At long times, two universality classes are found, both characterized by a distribution of the scalar -- generally non-Gaussian -- with global self-similar evolution in time. Analogous behavior is found numerically with a more realistic flow resulting from an inverse energy cascade.
引用
@article{arxiv.nlin/0010011,
title = {Universal decay of scalar turbulence},
author = {M. Chaves and G. Eyink and U. Frisch and M. Vergassola},
journal= {arXiv preprint arXiv:nlin/0010011},
year = {2009}
}
备注
4 pages, 3 Postscript figures, submitted to PRL