한국해안해양공학회지 (Journal of Korean Society of Coastal and Ocean Engineers)

한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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음해법을 이용한 WAM모형의 태풍파랑 수치모의

Numerical Simulation of Typhoon-generated Waves using WAM with Implicit Scheme

  • 천제호 (한동대학교 건설환경연구소) ;
  • 안경모 (한동대학교 공간환경시스템공학부) ;
  • 윤종태 (경성대학교 토목공학과)
  • Chun, Je-Ho (Institute of Construction and Environmental Research, Handong Global University) ;
  • Ahn, Kyung-Mo (School of Spatial Environmental System Engineering, Handong Global University) ;
  • Yoon, Jong-Tae (Department of Civil Engineering, Kyungsung University)
  • 발행 : 2006.12.31
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초록

양해법의 하나인 풍상차분을 사용하는 WAM 모형의 수치기법을 분할차분법을 이용한 음해법으로 바꾸고 수치분산을 줄이기 위해 FCT 기법을 적용하였다. 새로운 수치기법의 특성을 확인하기 위해 구형파 전파실험과 태풍 매미로 인한 파랑모의를 수행하였다. 기존의 WAM 모형에 비해 현저히 수치분산을 줄일 수 있었고, 음해법의 이용으로 비교적 큰 시간 격자 간격에서도 안정적으로 계산이 수행되어, 보다 경제적인 수치모의가 가능함을 확인하였다.

Implicit numerical scheme using fractional step method and FCT is used to improve the computational efficiency of WAM. Square wave test and simulation of typhoon generated waves are conducted to verify the numerical scheme. The applied scheme shows much less numerical diffusion and due to the implicit character of the scheme much larger time steps can be used without numerical instability. For typhoon MAEMI, comparison between the numerical results and the measured data shows good agreement.

키워드

참고문헌

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