✦ LIBER ✦

A NUMERICAL MODEL FOR THREE-DIMENSIONAL RUN-UP

✍ Scribed by H. Johnsgard; G. Pedersen

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 349 KB
Volume: 24
Category: Article
ISSN: 0271-2091
DOI: 10.1002/(sici)1097-0363(19970515)24:9<913::aid-fld523>3.0.co;2-6

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✦ Synopsis

A Lagrangian ®nite difference model for non-dispersive (long) and fully non-linear surface waves is presented. The Lagrangian description enables the inclusion of run-up and back-wash at sloping shores. The numerical procedure has been veri®ed through a series of tests, including systematic grid re®nements and comparison with analytical solutions for run-up.

Results for a few cases with moderately complex geometries are presented. The run-up distribution on an idealized headland is computed and discussed in view of the involved physical mechanisms. Some cases involve a time-dependent bottom topography, corresponding to a moving slide penetrating the ¯uid surface. The numerical solution procedure appears to be robust, unless wave breaking is encountered, and grid re®nement tests show fast convergence once the scales in the problems are resolved.

The presented work has been carried out under the GITEC and GITEC-TWO projects that have been funded by the European Commission, under the contracts EVCV-CT92-0175, ENV4-U96-0297, and by the

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