عنوان مقاله [English]
In this paper, wave breaking are modeled on uneven bed using Incompressible Smoothed Particles Hydrodynamics method. this method is originally used for astronomic problems Recently, ISPH is a lagrangian and meshless method based on particles, which is robust to modeling of flows with large deformations and complicated free surface.Wave breaking is complex phenomenon that occurs in free surface flows with large deformation. Dam break wave is one of this flow that can be caused losses and damages. Therefore prediction of water level position, velocity and pressure is essential. These problems are difficult to simulate due to the existence of the arbitrarily moving surface boundary conditions and also because of the complex governing equations of Navier–Stokes. therefore Governing equations are mass and momentum conservation equations that are solved using a two- step fractional method. In the first step, Navier-Stokes equations are solved by omitting pressure term and in the absence of incompressible condition. In the second step, the pressure term is applied and velocity values and exact particles position are computed.In the present model, a new technique is applied to allocate density to the particles. By employing this technique, ISPH method is stabled. In order to study of model applicability and its validation, dam break problem bumpy channel with open end is investigated. The simulated results indicate that many complicated flow phenomena occurred in flows with breaking waves, particular as clashing with obstacle such as, shock front propagation, partial reflections, hydraulic jumps and wave interaction, can be well simulated using ISPH method. Also the mean of relative error is obtained 9.243, 12.469 percent for two plots respectively. The good agreement between the results of present model and experimental data shows that ISPH model is powerful device to simulate complicated problems. and these results indicate that this model has a good accuracy.