A moving wave generating-absorbing boundary based on OpenFOAM

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

Sun, Jia Wen^1 ; Wang, Dong Xv^1

National Marine Environment Monitoring Center, State Oceanic Administration, Da'lian, Liaoning

116023, China^1

关键词: Absorbing boundaries;    Absorption effects;    Active-absorption;    Incident and reflected waves;    Moving boundaries;    Regular and irregular waves;    Surface elevations;    Time-domain methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/3/032035/pdf
DOI  :  10.1088/1755-1315/153/3/032035

来源: IOP

【 摘 要 】

This paper develops a moving wave generating-absorbing boundary based on the CFD toolbox OpenFOAM. The surface elevation of the moving boundary gauged in every time step is as the feedback signal of active absorption system. Three different equations of correction are considered in the present model to absorb the secondary reflection from the structure in the wave tank. The effect of this boundary under the conditions of regular and irregular waves is investigated and discussed. The stability factor method is used to analyze the absorption effect of regular waves, and a time-domain method is employed to separate the incident and reflected waves of the irregular waves. Results show that this moving boundary has good capability to not only generate regular/irregular waves but also absorb the secondary reflection satisfactorily.