SPH技法에 의한 波浪傳播의 數値模擬

Abstract

Smoothed Particle Hydrodynamics(SPH) method is one of meshless methods using the particle, which is different from previous methods using the mesh. In this study, two kinds of numerical simulation by SPH method are conducted for knowing the possibility of applying flow phenomenon of fluid. First of all, it is simulated about using the open boundary structure and the result is compared with Takikawa and Kim's experimental data. And a good result is obtained. The sensitive analyses on the smoothing length and particle number are performed. These terms are related to the efficiency and accuracy of the numerical simulation, and the phenomenon of fluid by using the particle and velocity vector is also visualized. Secondly, the numerical simulation about wave propagation by impermeable submerged breakwater is carried out. The results are compared with ?y???w?? and Takikawa and Kim's experimental data. For the more detail comparison, reflection coefficient for impermeable submerged breakwater is also compared in Ijima and Sasaki and Takikawa and Kim's experimental data respectively and is obtained a satisfactory result. In like manner, wave screening performance of the impermeable submerged breakwater with various crown height and widths are express reflection coefficient. Finally, it is shown that this method could be applied to the various fluid phenomenon of hydraulic structure such as submerged breakwater and the method of ocean waves like a storm surge or tsunami.