The numerical simulation of local scour in front of a vertical-wall breakwater
A two-dimensional numerical wave flume was established based on an arbitrary Lagrangian-Eulerian (ALE) description of the Navier-Stokes equations for incompressible and viscous fluid, which is spatially discretized by finite element method (FEM) and marching in time with a fractional step algorithm. The second-order nonlinear Stokes waves were generated numerically and the standing waves were formed in front of a vertical-wall breakwater. The transports of uniformly noncoherent sediment bed load were modeled to simulate the local scour process at the toe of the breakwater. The scouring patterns at the earlier stage of scouring agree with that obtained in Xie’s experiment (1983).
Key wordsnumerical wave flume noncoherent sediment local scour pattern ALE vertical-wall breakwater
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- CARTER, T.G., LIU, P.L.F. and MEI, C.C., Mass transport by waves and offshore sand bedforms [J]. Journal of Waterway, Harbours and Coastal Engineering. Div. ASCE, 1973, 99:165–184.Google Scholar
- FREDS¢E. J. and DEIGAARD R., Mechanics of Coastal Sediment Transport [M]. World Scientific Publishing Co. Pte. Ltd. 1992.Google Scholar
- GISLASON, K., Freds¢e, J., MAYER, S. and SUMER, B.M., The mathematical modeling of the scour in front of the toe of a rubble mound breakwater[M], In: Book of Abstracts, 27th International Coastal Engineering Conference, ASCM, Sydney, Australia, Vol. 1, Paper No. 130., 2000Google Scholar
- MEI, C.C., The Applied Dynamics of Ocean Surface Waves [M]. John Wiley & Sons, Inc. 1983.Google Scholar
- SUMER, B. M. and Freds¢e, J., The Mechanics of Scour in the Marine Environment [M]. World Scientific Publishing Co. Pte. Ltd. 2002.Google Scholar
- XIE Shi-leng. Scouring patterns in front of vertical breakwaters and their influences on the stability of the foundations of the breakwaters [J]. Acta Oceanologica Sinica, 1983, 5(6):808–823. (in Chinese)Google Scholar