SPH模拟自由表面流动的边界处理新方法

new approach of boundary treatment was developed to simulate the free surface flow by using SPH method. The free surface was captured by the fluctuation of densities of fluid particles. The densities of mirror particles were calculated according to the temporal and spatial changing of the free surface, ensuring the correct simulation both of interactions between the solid boundary and the fluid flow and the stabilization of the free surface when the transform of wet and dry solid boundary existed. The fluid flow due to dam breaking was simulated. Comparisons of numerical simulation results with experiments showed that the present boundary treatment was reasonable. Moreover, generation and transmission of solitary waves were modeled to validate the stabilization of the new boundary treatment approach.