An Implicit Unstructured Finite Element Method for Diffraction of Water Waves by Two-Dimensional Floating Breakwaters

J. Ocean Eng. Technol. 1997;11(4):90-101.

부유체 주위의 2차원 회절 문제를 위한 내율적 비정렬 격자 유한요소해법

정구창

삼성중공업(주) 조선플랜트연구소

Keywords: Floating Breakwater, Unstructured Grid, Finite Element Method, Diffraction Problem, Matrix Solver

핵심용어: 부소파제, 비정렬 격자, 유한요소법, 회절문제, 행렬해법

Abstract

A hybrid element method is presented for two-dimensional diffraction problem of water waves. In this method, only a limited fluid domain close to irregular bodies is discretized into conventional finite elements, while the remaining infinite domain is treated as one element with analytical representations of high accuracy. A finite element grid is automatically generated by using Dealunay triangulation based on the Bowyer's algorithm and a linear system of equations is approximately solved with the ILU-CGS algorithm. To validate the present scheme, Computational results are compared with the existing experimental data and other numerical solutions.