Numerical modelling of wave motion and seabed response around a submerged porous breakwater

J.-S. Zhang, B. Wang, D.-S. Jeng, Y.-K. Guo

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    Abstract

    In this study, a numerical model is developed to investigate the wave motion and seabed response around a submerged porous breakwater due to a surface solitary wave. The wave motion is simulated by numerically solving the extended Navier-Stokes (NS) equations, and the seabed response is gained from the numerical solutions of poro-elastic theory. The existing wave model (COBRAS) and soil model (PORO-WSSI I) are combined to establish the new model - PORO-WSSI II. The numerical model is applied to investigate the effects of porosity and equivalent mean diameter of porous media on the wave propagation in the vicinity of porous structure. The results show that the porosity has more impact than equivalent mean diameter on the wave transformation and flow structure. The solitary wave-induced seabed responses such as pore pressure and vertical effective stress around the foundation of porous breakwater are presented as a case study.
    Original languageEnglish
    Title of host publicationProceedings of the International Offshore and Polar Engineering Conference
    Pages1003-1010
    Number of pages8
    Volume3
    Publication statusPublished - 1 Jan 2010

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    Zhang, J-S., Wang, B., Jeng, D-S., & Guo, Y-K. (2010). Numerical modelling of wave motion and seabed response around a submerged porous breakwater. In Proceedings of the International Offshore and Polar Engineering Conference (Vol. 3, pp. 1003-1010) http://www.isope.org/publications/publications.htm