Simulations of Extreme Wave Runup on a Vertical Wall by Analytic Boussinesq Model

Ruddy Kurnia

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)

    Abstract

    Wave runup on a vertical wall has both fundamental and practical interest. The wave impact on a structure is an important aspect that must be taken into account in the design of coastal structures. From linear wave theory, it is known that the wave amplitude on a vertical fully reflecting wall is twice the amplitude of the incoming wave. The result may be different for nonlinear dispersive waves. Following [1], we show that the propagation of a short wave group of very long nonlinear monochromatic waves above a flat bottom, can increase the amplitude nonlinearly in the travel to a wall, and produce much higher amplitudes on the wall compared to the initial amplitude: the amplification of such a wave can reach six times the initial amplitude. The strong amplification due to the combined action of nonlinear steepening and dispersion before the wall leads to waves that resemble undular bores. Using the same principles, we show that the propagation of a focusing wave group to a wall that is located at the focusing point of the wave can produce an extreme runup with 11 times amplification of the maximum initial amplitude. The simulations are done by HAWASSI-AB, a spatial-spectral implementation of Analytic Boussinesq model [2].
    Original languageUndefined
    Title of host publicationASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering: 7: Ocean Engineering
    Place of PublicationUSA
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Pages-
    Number of pages8
    ISBN (Print)978-0-7918-4998-9
    DOIs
    Publication statusPublished - 19 Jun 2016
    EventASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2016 - Busan, Korea, Republic of
    Duration: 19 Jun 201624 Jun 2016
    Conference number: 35

    Publication series

    Name
    PublisherThe American Society of Mechanical Engineers
    Volume7: Ocean E

    Conference

    ConferenceASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2016
    Abbreviated titleOMAE
    CountryKorea, Republic of
    CityBusan
    Period19/06/1624/06/16

    Keywords

    • EWI-27435
    • IR-102266
    • METIS-319488

    Cite this

    Kurnia, R. (2016). Simulations of Extreme Wave Runup on a Vertical Wall by Analytic Boussinesq Model. In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering: 7: Ocean Engineering (pp. -). [OMAE2016-54365] USA: American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2016-54365