One of the key factors of computation of wave breaking is the improvement of water surface tracking. The Lagrangian particle method has the advantage in the description of complicated behavior of water surface including a splashing, over the Eulerian grid-base models. Another significant factor of wave breaking is a turbulence. To describe a turbulence, being in the same way as the SGS(=Sub-Grid-Scale) model of turbulence, such as the LES in Eulerian approaches, the SPS(=Sub-Particle-Scale) model is required in the particle method. The analysis of wave breaking by the particle method has just begun, hence there is no studies of numerical simulation by the particle method with the SPS-turbulence model. In this study, the SPS-turbulence model, which had been proposed by the authors, is applied to the wave breaking on the uniform slope.
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