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| Titel |
Effect of macro-roughness on solitary wave breaking |
| VerfasserIn |
Alioune Nar Sambe, Damien Sous, Frederic Golay, Philippe Fraunié, Richard Marcer |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250032014
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| Zusammenfassung |
| This numerical study aims to analyze the effect of macro-roughness on solitary wave breaking. Wave breaking is simulated by solving Euler equations with a two phases incompressible flow model. The hyperbolic system of conservation laws is solved with a finite volume discretization on unstructured grids. An artificial compressibility approach allows a fully explicit scheme for an efficient parallel implementation. The numerical model is based on a low Mach number preconditioning and a second order Riemann solver.
Several test cases are performed to determine the influence of macro-roughness on the breaking dynamics. The influence of the macro-roughness elements on the solitary wave breaking is shown to depend on two dimensionless ratios D/A and H/A, where D, H and A are the separation distance between macro-roughness elements, the height of the elements and the wave amplitude, respectively. Significative effects are observed for large values of D/A and H/A, with strong impairments of the successive cycles of impact/splash-ups/rebounds and reduction of the runup distance. |
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