Utilização do método SPH para estudo de escoamento sobre vertedouros em degraus

Abstract

Spillways are structures used with several functions, such as flow measurement and control and discharge of excess water downstream, to those attached to dams, which must be properly designed to avoid compromising the structure. Numerical methods have been increasingly studied as pre-design tools and the SPH method is a promising tool for the study of fluid dynamics. In the present work, DualSPHysics software was used to analyze the flow of water over a stepped spillway with 1 V : 0.75 H (53.13°) configuration, which is little reproduced with the method, comparing the experimental and numerical results obtained by other authors. Thus, convergence criteria for the model were analyzed, based on quantitative and qualitative checks, in order to define the simulation constants, parameters and specifications, and then compare the speed and pressure profiles of different tests with varying simulation input data. The detection of free surface along the chute and the temporal evolution of the tests were also presented. Special treatments were used to obtain better results, which in turn proved to be satisfactory when comparing data of average percentage differences.