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| Titel |
Path-integrated Lagrangian measures from the velocity gradient tensor |
| VerfasserIn |
V. Pérez-Muñuzuri, F. Huhn |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 20, no. 6 ; Nr. 20, no. 6 (2013-11-15), S.987-991 |
| Datensatznummer |
250086072
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| Publikation (Nr.) |
 copernicus.org/npg-20-987-2013.pdf |
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| Zusammenfassung |
| Spatial maps of the finite-time Lyapunov exponent (FTLE) have been used
extensively to study LCS in two-dimensional dynamical systems, in particular
with application to transport in unsteady fluid flows. We use the
time-periodic double-gyre model to compare spatial fields of FTLE and the
path-integrated Eulerian Okubo–Weiss parameter (OW). Both fields correlate
strongly, and by solving the dynamics of the deformation gradient tensor, a
theoretical relationship between both magnitudes has been obtained. While for
long integration times more and more FTLE ridges appear that do not seem to
coincide with the stable manifold, ridges in the field of path-integrated OW
represent fewer additional structures. |
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