A newly developed numerical model has been used to study sediment suspensions above vortex ripples under breaking wave conditions. The model solves momentum and mass conservation equations on an orthogonal curvilinear grid. The wave-breaking effect is included by modifying the boundary condition near the water surface to allow time-varying additional turbulence generated from the breaking bore during certain wave phases. The model has been tested against field conditions, and the comparisons against measurements reveal that the simple approach used in the present model for the wave breaking simulation yields satisfactory results of sediment suspension under breaking wave conditions.
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