Application of Iterative Procedure to the wave Field with Energy Dissipation Area

J. Ocean Eng. Technol. 1998;12(1):120-127.

에너지 감쇠역을 포함하는 파랑장에 대한 반복기법의 적용

윤종태

경성대학교 공과대학 토목공학과

Keywords: Mild Slope Equation, Conjugate Method, Energy Dissipation Area, Diffraction, Reflection, Elliptic Model, Iterative Solution

핵심용어: 완경사 방정식, 공해경사법, 에너지 감쇠역, 회절, 반사, 타원형 모형, 반복해

Abstract

An Elliptic model for calculating the combined refraction/diffraction of monochromatic linear waves is developed, including a term which allows for the dissipation of wave energy. Conjugate gradient method is employed as a solution technique. Wave height variations are calculated for localized circular and rectangular dissipation areas. It is shown that the numerical results agree very well with analytical solution in the case of circular damping region. The localized dissipation area creates a shadow region of low wave energy and the recovery of wave height by diffraction occurs very slowly with distance behind the damping region.