Coanda effect in coastal flows

In the present paper some numerical simulations and experiments were carried out to study jet-wall interaction in shallow waters. Namely, modifications of the hydrodynamic field concerning the interaction of river run-off with a shallow coastal water body, due to the presence of marine structures, w...

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Bibliographic Details
Published in:Coastal engineering (Amsterdam) 2010-03, Vol.57 (3), p.278-289
Main Authors: Lalli, Francesco, Bruschi, Antonello, Lama, Rodolfo, Liberti, Luca, Mandrone, Stefania, Pesarino, Valeria
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
Finite difference
Flow visualization
Geomorphology, landform evolution
Jet-wall interaction
Marine and continental quaternary
PIV
Shallow flow
Surficial geology
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Summary:In the present paper some numerical simulations and experiments were carried out to study jet-wall interaction in shallow waters. Namely, modifications of the hydrodynamic field concerning the interaction of river run-off with a shallow coastal water body, due to the presence of marine structures, were investigated. Stratification effects due to salinity and temperature were neglected, and the interest was focused on barotropic features (Coanda effect). The numerical analysis was carried out by means of shallow water equations, numerically solved by finite difference, and the present method was validated by means of a typical simple-shaped test case. The experiments were carried out in a shallow water tank, flow visualizations were performed, and the velocity field was obtained by PIV. The main features of jet-wall interaction flow were investigated in simple-shaped geometries, and applications were shown for two practical cases: Pescara channel harbour (Adriatic Sea, Italy) and the proposed design of Latina harbour (Tyrrhenian Sea, Italy).
ISSN:0378-3839
1872-7379
DOI:10.1016/j.coastaleng.2009.10.015