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| Titel |
Diffusion-affected passive scalar transport in an ellipsoidal vortex in a shear flow |
| VerfasserIn |
K. V. Koshel, E. A. Ryzhov, V. V. Zhmur |
| 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. 4 ; Nr. 20, no. 4 (2013-07-01), S.437-444 |
| Datensatznummer |
250018981
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| Publikation (Nr.) |
 copernicus.org/npg-20-437-2013.pdf |
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| Zusammenfassung |
| By employing an analytical model for a constant-vorticity distributed vortex,
namely, the ellipsoidal vortex embedded in a constant buoyancy frequency
shear flow, the problem of the passive scalar transport through the vortex's
boundary is addressed. Since the model's governing equations do not allow
such transition to occur, we implement a low-scale diffusion process into the
vortex model. Taking into consideration the diffusion term, we study the
passive scalar transport in a steady state (the boundary of the ellipsoidal
vortex does not change in time) and in a perturbed state (the boundary of the
ellipsoidal vortex changes in time periodically) within the time scope
corresponding to the characteristic life cycle of a mesoscale oceanic eddy.
An increase of the passive scalar transport through the boundary in the
perturbed state in comparison with the steady state due to the irregular
dynamics of the surrounding flow is shown. The applicability scopes of the
investigation for studying oceanic eddies in nature are discussed. |
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