Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Parametric Study on EOM-based 2D Numerical Wave Generation using OpenFOAM

OpenFOAM을 이용한 EOM 기반 2차원 수치 파 생성에 관한 파라메트릭 연구

  • Moon, Seong-Ho (Dept. of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University) ;
  • Lee, Sungwook (Dept. of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University) ;
  • Paik, Kwang-Jun (Dept. of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kwon, Chang-Seop (Ship and Offshore Research Institute, Samsung Heavy Industries)
  • 문성호 (한국해양대학교 조선해양시스템공학과) ;
  • 이성욱 (한국해양대학교 조선해양시스템공학과) ;
  • 백광준 (인하대학교 조선해양공학과) ;
  • 권창섭 (삼성중공업 조선해양연구소)
  • Received : 2018.07.03
  • Accepted : 2018.09.03
  • Published : 2018.12.20
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Abstract

The consistency of the initially designed waves in the domain is essential for accurate calculation of the added resistance in waves through CFD. In particular, unwanted reflected waves at domain boundaries can cause incorrect numerical solutions due to the superposition with initially designed waves. Euler Overlay Method(EOM) is one of the methods for reducing wave reflections by adding an additional source term to momentum and phase conservation equations, respectively. In this study, we apply the Euler Overlay Method(EOM) to the open-source CFD library, OpenFOAM(R), to simulate the accurate free-surface waves in the domain and the parametric study is performed for efficient implementation of Euler Overlay Method(EOM). Considering that the damping efficiency depends on the selection of the overlay parameter in the added source terms, the size of overlay zone and the wave steepness, the influences of these factors are tested through the wave elevation measured at constant time intervals in the 2D numerical wave tank. Through this process, guidelines for selection of optimal overlay parameter and overlay zone size that can be applied according to the scaling law are finally presented.

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References

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