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| Titel |
LES-COAST: a large eddy simulation tool for coastal hydrodynamics |
| VerfasserIn |
V. Armenio, F. Roman |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021254
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| Zusammenfassung |
| We discuss a LES methodology for large-scale, environmental problems. Specifically we
discuss peculiar features of the model LES-COAST, developed by IE-Fluids, University of
Trieste, for the Italian Agency of Environmental Protection (APAT). The model is suited for
marine, complex-geometry, anisotropic problems, typically occuring in coastal engineering.
The model solves the curvilinear-coordinate formulation of the filtered Navier-Stokes
equation using finite differences over structured grids. Geometrical complexity is managed
using immersed boundaries as described in Roman et al. (Computer & Fluids, in press, 2009).
A new wall-layer parametrization is used to model the near wall layer which cannot be
directly resolved in applicative high Reynolds number applications. Due to grid
anisotropy occurring in coastal problems a two-SGS eddy viscosity model has been
developed.
Examples of application of the model are also discussed. Specifically we show some
results of the simulation of the Tevere river runoff in the Tyrrhenian sea and of the
three-dimensional transport and mixing in the Muggia Bay (Gulf of Trieste) under breeze
forcing. The numerical model is presently used for research as well for consultant
activity for the prediction of dispersion phenomena in shallow-water near-shore areas. |
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