Development of a 3D numerical wind wave tank using an explicit method of water surface location

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Development of a 3D numerical wind wave tank was tried to compute air flow, water flow and wind waves. From previous results, it has been found that there is large gradient of velocity at water surface. In this study, two explicit methods to treat water surface were proposed, but the numerical model using the methods didn't have enough accuracy. From visualization experiments carried out to be compared with numerical results, it was found that air flow separation over wind waves controlled momentum transfer between air side and water side. This result suggests that air flow separation strongly affects self control of development mechanism of wind waves.