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| Titel |
Numerical investigation of algebraic oceanic turbulent mixing-layer models |
| VerfasserIn |
T. Chacón-Rebollo, M. Gómez-Mármol, S. Rubino |
| 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 (2013-11-06), S.945-954 |
| Datensatznummer |
250086068
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| Publikation (Nr.) |
 copernicus.org/npg-20-945-2013.pdf |
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| Zusammenfassung |
| In this paper we investigate the finite-time and asymptotic behaviour of
algebraic turbulent mixing-layer models by numerical simulation. We compare
the performances given by three different settings of the eddy viscosity. We
consider Richardson number-based vertical eddy viscosity models. Two of these
are classical algebraic turbulence models usually used in numerical
simulations of global oceanic circulation, i.e. the Pacanowski–Philander and
the Gent models, while the other one is a more recent model (Bennis et al., 2010) proposed
to prevent numerical instabilities generated by physically unstable
configurations. The numerical schemes are based on the standard finite
element method. We perform some numerical tests for relatively large
deviations of realistic initial conditions provided by the Tropical
Atmosphere Ocean (TAO) array. These initial conditions correspond to states
close to mixing-layer profiles, measured on the Equatorial Pacific region
called the West-Pacific Warm Pool. We conclude that mixing-layer profiles
could be considered as kinds of "absorbing configurations" in finite time
that asymptotically evolve to steady states under the application of negative
surface energy fluxes. |
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