Novel method of boundary condition of dam-break phenomena using ghost-particle SPH

The smoothed particle hydrodynamics (SPH) is a Lagrangian method effective in the simulation of free surface flows. In this paper, the evolution of dam break with dry bed was modeled through the SPH. First, the basis of the SPH was reviewed, including techniques essential for representing the equations concerning the problem. In this modeling, a new approach known as leapfrog was employed for the time step scheme, thus improving the results of modeling. The results of PVS-break model implemented in MATLAB were validated versus experimental results. The shape of waves generated indicated good compatibility with experimental modeling. The results of Mann–Whitney test revealed that there was no significant difference between the waves generated from PVS-break and the experimental models (P value ≥ 0.05). The results of this model as compared with those of other studies suggested that the current model is very powerful given the techniques employed in the numerical modeling of dam break.