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| Titel |
Modelling of tsunami-like wave run-up, breaking and impact on a vertical wall by SPH method |
| VerfasserIn |
M. H. Dao, H. Xu, E. S. Chan, P. Tkalich |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 12 ; Nr. 13, no. 12 (2013-12-23), S.3457-3467 |
| Datensatznummer |
250085598
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| Publikation (Nr.) |
 copernicus.org/nhess-13-3457-2013.pdf |
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| Zusammenfassung |
| Accurate predictions of wave run-up and run-down are
important for coastal impact assessment of relatively long waves such as
tsunami or storm waves. Wave run-up is, however, a complex process involving
nonlinear build-up of the wave front, intensive wave breaking and strong
turbulent flow, making the numerical approximation challenging. Recent
advanced modelling methodologies could help to overcome these numerical
challenges. For a demonstration, we study run-up of non-breaking and
breaking solitary waves on a vertical wall using two methods, an enhanced
smoothed particle hydrodynamics (SPH) method and the traditional
non-breaking nonlinear model Tunami-N2. The Tunami-N2 model fails to capture
the evolution of steep waves at the proximity of breaking that was observed in
the experiments. Whereas the SPH method successfully simulates the wave
propagation, breaking, impact on structure and the reform and breaking
processes of wave run-down. The study also indicates that inadequate
approximation of the wave breaking could lead to significant
under-predictions of wave height and impact pressure on structures. The SPH
model shows potential applications for accurate impact assessments of wave
run-up on to coastal structures. |
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