Research on Numerical Simulation Method for Multi-directional Waves

Abstract

We have developed the numerical calculation method to simulate the short crested wave fields. In this paper, we compare the simulated multi-directional waves with the measured waves in experiments using directional wave spectrum, as the results we confirm that this simulator of multi-directional waves is useful to express the short crested wave field. On the other hand, because this simulator uses the linear summation method of regular waves, the simulated waves may have very large wave steepness as breaking in real sea state. To have reality the simulated waves, we contain the algorithm of numerical estimation of breaking wave fields. The algorithm has the wave height limitation of breaking wave using the acceleration of water surface elevation. We compare the simulated multi-directional waves using the breaking wave estimation with the measured waves in experiments with breaking waves. As the results, we confirm that the algorithm of breaking wave estimation is useful to simulate the wave heights including breaking waves.