Numerical study of the wave dissipation performance of two plate-type open breakwaters based on the Navier–Stokes equations

In this study, wave generation is simulated using the velocity wave generation method. A damping wave dissipation region is established to eliminate wave reflection at the flume tail. Fluid motion is described using the Navier–Stokes equations. The water free surface is captured using the volume of fluid method. A 2D numerical model for the interactions between waves and plate-type open breakwaters is constructed using the finite volume method, and their correctness is validated by experimental results. Based on these models, two plate-type open breakwaters are compared in terms of the wave transmission coefficient ( K t ), wave reflection coefficient ( K r ), wave energy dissipation coefficient ( K d ) and wave energy distribution. By comprehensively considering K t , K r , K d and the wave energy distribution, the double-arc plate-type open breakwater is found to exhibit higher wave dissipation performance.