Numerical Analysis of the Three-Dimensional Nonlinear Waves Caused by Breaking Waves around a Floating Offshore Structure

J. Ocean Eng. Technol. 1996;10(3):62-73.

부유식 해양구조물 주위의 쇄파현상을 동반한 3차원 비선형성 파의 수치해석

박종천,관전수명

한국기계연구원 해양공학연구센터,동경대학교 공과대

Keywords: Three Dimensional Breaking Waves, Floating Offshore Structure, Incident Gravity Wave, Finite Difference Method, Navier Stokes Equation, Two-layer Flow, Density-function Technique

핵심용어: 3차원 쇄파, 부유식 해양구조물, 입사 중력파, 유한차분법, 나비에 스토크스 방정식, 2층류, 밀도함수 기법

Abstract

Numerical simulation is made of the three-dimensional wave breaking motion about a part of a floating offshore structure containing a circular cylinder mounted vertically onto a lower hull in regular periodic gravity wave generated by a numerical wave maker. TUMMAC-VIII finite-difference method is newly developed for such a problem. By use of density-function technique the three-dimensional wave breaking motion is approximately implenented in the framework of rectangular grid system. A porosity technique is devised for the implementation of the no-slip bydy boundary conditions. The generation of breaking waves by the interaction of incident waves with the structure is well simulated and interesting features of breaking waves are revealed with containing degree of quantitative and qualitative accuracy.