A soft bottom mud, which is easy to be entrained, sometimes brings a problem of turbidity. The ordinary layered fluid model for the wave induced seabed motion, which assumes the existence of the sinusoidal-curved interfaces of fluid- and mud-layers, cannot be applied to a wave breaking. To overcome this limitation of the layered fluid model, the wave-seabed interaction is simulated based on the Lagrangian gridless analysis of solid-liquid two-phase flow.
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