Multi-particle dispersion in fully developed turbulence
Chaotic Dynamics
2016-09-08 v1 Fluid Dynamics
Abstract
The statistical geometry of dispersing Lagrangian clusters of four particles (tetrahedra) is studied by means of high-resolution direct numerical simulations of three-dimensional homogeneous isotropic turbulence. We give the first evidence of a self-similar regime of shape dynamics characterized by almost two-dimensional, strongly elongated geometries. The analysis of four-point velocity-difference statistics and orientation shows that inertial-range eddies typically generate a straining field with a strong extensional component aligned with the elongation direction and weak extensional/compressional components in the orthogonal plane.
Cite
@article{arxiv.nlin/0503070,
title = {Multi-particle dispersion in fully developed turbulence},
author = {L. Biferale and G. Boffetta and A. Celani and B. Devenish and A. Lanotte and F. Toschi},
journal= {arXiv preprint arXiv:nlin/0503070},
year = {2016}
}
Comments
4 pages, 5 figures