A new Eulerian-Lagrangian length-scale in turbulent flows
Chaotic Dynamics
2007-05-23 v1
Abstract
We introduce a time-dependent Eulerian-Lagrangian length-scale and an inverse locality hypothesis which explain scalings of second order one-particle Lagrangian structure functions observed in Kinematic Simulations (KS) of homogeneous isotropic turbulence. Our KS results are consistent with the physical picture that particle trajectories are more/less autocorrelated if they are smoother/rougher as a result of encountering less/more straining stagnation points, thus leading to enhanced/reduced turbulent diffusion.
Cite
@article{arxiv.nlin/0209058,
title = {A new Eulerian-Lagrangian length-scale in turbulent flows},
author = {M. A. I. Khan J. C. Vassilicos},
journal= {arXiv preprint arXiv:nlin/0209058},
year = {2007}
}
Comments
4 pages, 3 figures, submitted to PRL