The diverse nature of small-scale turbulence
Abstract
The self-similar Richardson cascade admits two logically possible scenarios of small-scale turbulence at high Reynolds numbers. In the first scenario, eddies' population densities vary as a function of eddies' scales. As a result, one or a few eddy types dominate at small scales, and small-scale turbulence lacks diversity. In the second scenario, eddies' population densities are scale-invariant across the inertial range, resulting in small-scale diversity. That is, there are as many types of eddies at the small scales as at the large scales. In this letter, we measure eddies' population densities in three-dimensional isotropic turbulence and determine the nature of small-scale turbulence. The result shows that eddies' population densities are scale-invariant.
Keywords
Cite
@article{arxiv.2105.01809,
title = {The diverse nature of small-scale turbulence},
author = {Ke-Qi Ding and Kun Yang and Xiang Yang and Yi-Peng Shi and Shi-Yi Chen},
journal= {arXiv preprint arXiv:2105.01809},
year = {2021}
}