Smooth particle hydrodynamics simulation of dam-break impacting different obstacles

Abstract

Aiming at the problems of smoothed particle hydrodynamics (SPH) method boundary imposing difficulties and particles easily penetrating solid walls, an improved complex boundary processing method is proposed. First, the improved SPH method is applied to numerically simulate the dam-break flow problem, and the numerical results are compared with the experimental results to verify the effectiveness of the method; then, the flux is added to the continuity equation to improve the pressure; finally, Numerical simulation is carried out to study the flow state of the dam-break water under different conditions of impacting on different obstacles, and the obstacles are considered as columnar, columnar with holes, wedge-shaped, semi-circular, 1/4 lower right circle obstacles and 1/4 upper right circle obstacles. The results show that: the stable pressure field can be obtained by adding flux; the improved boundary treatment method can effectively prevent particles from penetrating the solid wall, which is suitable for any complex boundary; SPH method has significant advantages in dealing with strongly nonlinear extreme deformation flow problems such as dam-break.