SPH–Based Fluid Simulation For Details

In this paper the simulation of dam-break problems are carried out by using the smoothed particle hydrodynamics(SPH)method which is coupled by a new presented solid-wall boundary conditions.In order to ensure particles not to penetrate the border,it usually needs to add human resistance on the particles near the border for reducing the velocity in the original boundary treating method.But it is difficult to finely tune the parameter controlling the size of human resistance which is problem depended.The failing of tuning the parameter always leads to inaccurate velocity of the particles near the border and conservation of the momentum.In this work we applied a new presented boundary condition by distributing ghost particles on and out of the border,the repulsive force of the ghost particles can be calculated by using the inner particles.The accuracy of the velocity of the particles near the border is improved.Furthermore,we coupled the particle diffuse model to the SPH method in order to accurately capture the splashing particles,which are classed into spray,foam and air bubbles.These particles enhance the visual effect of fluid flow.Finally,we conduct the numerical simulation of four dam-break problems.The numerical results are compared to the the experimental results and show that the algorithm presented in this paper can effectively capture the diffusion phenomenon,and presented method also effectively improves the visual effect of fluid flow.