Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Regular Wave Generation Using Three Different Numerical Models under Perfect Reflection Condition and Validation with Experimental Data

세 가지 수치모델을 이용한 완전반사 조건에서의 규칙파 조파 및 수리실험 검증

  • Oh, Sang-Ho (Coastal Development and Ocean Energy Research Center, Korea Institute of Ocean Science and Technology) ;
  • Ahn, Sukjin (Research and Development Institute, GeoSystem Research Corporation)
  • 오상호 (한국해양과학기술원 연안개발.에너지연구센터) ;
  • 안석진 ((주)지오시스템리서치 부설연구소)
  • Received : 2019.06.17
  • Accepted : 2019.06.28
  • Published : 2019.08.31
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Abstract

Regular waves were generated in a wave flume under perfect reflection condition to evaluate performance of three CFD models of CADMAS-SURF, olaFlow, and KIOSTFOAM. The experiments and numerical simulations were carried out for three different conditions of non-breaking, breaking of standing waves, and breaking of incident waves. Among the three CFD models, KIOSTFOAM showed best performance in reproducing the experimental results. Although the run time was reduced by using CADMAS-SURF, its computational accuracy was worse than KIOSTFOAM. olaFlow was the fastest model, but active wave absorption at the wave generation boundary was not satisfactory. In addition, the model excessively dissipated wave energy when wave breaking occurred.

2차원 조파수조에서 완전반사 조건의 규칙파 조파 실험을 수행하고, 세 가지 서로 다른 CFD 모델의 성능을 검증하였다. 사용된 CFD 모델은 CADMAS-SURF, olaFlow 및 KIOSTFOAM이었다. 쇄파가 발생하지 않는 조건, 중복파의 쇄파가 발생하는 조건, 입사파의 쇄파가 발생하는 조건에서 실험 및 모델링을 수행하였다. 그 결과 세 모델 중 KIOSTFOAM이 실험결과를 가장 잘 재현하는 것으로 나타났다. CADMAS-SURF는 KIOSTFOAM에 비해 계산 시간은 줄어들지만 계산 정확도가 상대적으로 더 낮았다. olaFlow는 계산은 가장 빠르지만 조파 경계에서 반사파 흡수가 만족스럽지 않고 쇄파 발생 시 파랑에너지를 과도하게 소산시키는 것으로 나타났다.

Keywords

References

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