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http://dx.doi.org/10.3744/SNAK.2018.55.6.490

A Parametric Study on EOM-based 2D Numerical Wave Generation using OpenFOAM  

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)
Publication Information
Journal of the Society of Naval Architects of Korea / v.55, no.6, 2018 , pp. 490-496 More about this Journal
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.
Keywords
Computational fluid dynamics; Wave reflections; Wave damping; Euler overlay method; OpenFOAM; Added resistance;
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