Automated detection of coherent Lagrangian vortices in two-dimensional unsteady flows
Dynamical Systems
2015-01-19 v3 Graphics
Atmospheric and Oceanic Physics
Fluid Dynamics
Abstract
Coherent boundaries of Lagrangian vortices in fluid flows have recently been identified as closed orbits of line fields associated with the Cauchy-Green strain tensor. Here we develop a fully automated procedure for the detection of such closed orbits in large-scale velocity data sets. We illustrate the power of our method on ocean surface velocities derived from satellite altimetry.
Keywords
Cite
@article{arxiv.1404.3109,
title = {Automated detection of coherent Lagrangian vortices in two-dimensional unsteady flows},
author = {Daniel Karrasch and Florian Huhn and George Haller},
journal= {arXiv preprint arXiv:1404.3109},
year = {2015}
}
Comments
17 pages, 6 figures, 1 table, accepted for publication in Proc. R. Soc. Lond., Ser. A