数値波動水槽における波浪環境再現装置の開発

概要

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The fully-nonlinear multi-directional waves are reproduced using by a 3D viscous Numerical Wave Tank (NWT) simulation technique. The governing equations, Navier-Stokes (N-S) and continuity equations, are discretized by a finite-difference method in the framework of a rectangular coordinate system, and the boundary values are updated at each time step in a time-marching procedure. The fully-nonlinear kinematic free-surface condition is satisfied by the marker-density function technique. The directed incident waves are generated by multi-segmented wavemaker on the basis of the so-called "snake-principle", and the outgoing waves are numerically dissipated inside an artificial damping zones located at the opposite side of wavemaker. In this study, we present results for the generation of regular waves including numerical convergence tests, irregular waves, and multi-directional random waves including the Bull's eye wave.
社団法人日本船舶海洋工学会の論文