Wave Forces Acting on Vertical Cylinder and Their Wave Transformations by 3-Dimensional VOF Method

J. Ocean Eng. Technol. 2007;21(2):12-21.

Lee, Kwang-Ho;Lee, Sang-Ki;Sin, Dong-Hoon;Kim, Chang-Hoon;Kim, Do-Sam;

Department of Civil Engineering, Nagoya University;Department of Civil and Environmental Engineering, Graduate School, Korea Maritime University;Department of Civil and Environmental Engineering, Graduate School, Korea Maritime University;Department of Ci

3차원 VOF법에 의한 연직 주상구조물에 작용하는 파력과 구조물에 의한 파랑변형 해석

이광호;이상기;신동훈;김창훈;김도삼;

일본나고야대학교 대학원 공학연구과;한국해양대학교 대학원 토목환경공학과;한국해양대학교 대학원 토목환경공학과;한국해양대학교 대학원 토목환경공학과;한국해양대학교 건설환경공학부;

Keywords: Vertical cylinder, 3-Dimensional VOF(Volume of Fluid) method, Navier-Stokes equation, Wave forces, Wave transformations

핵심용어: 연직 주상구조물, 3차원 VOF법, Navier-Stokes 방정식, 파력, 파랑변형

Abstract

As the economy grows and the population increases, we need to develop our coastal area and make use of it for various purposes. Specifically, investigation of the wave interactions on and around the vertical cylinders is very important in the design of the offshore or coastal structures. The nonlinear potential analysis developed so far, although very useful, has been found to be limited in application, as strong nonlinear waves generated by the interference between multilayered cylinders and wave impact forces by breaking waves can hardly be estimated. In this study, using a 3-Dimensional volume tracking method VOF(Volume of Fluid), based on Namer-Stokes equations, was developed to simulate highly nonlinear effects, such as breaking waves at the interface or complicated interference waves among structures. A numerical method for nonlinear interaction wave and vertical cylinders is newly proposed. The wave forces and wave transformations computed by the newly proposed numerical simulation method were compared to the other researcher's experimental results, and the results agree well. Based on the validation of this study, this numerical method is applied to the two vertical cylinders to discuss their nonlinear wave forces and wave transformations, according to the variations of separate distance of vertical cylinders.