Numerical Simulations of Wave and Flow Variations between Submerged Breakwaters and Slope Seawall

摘要

In this study, we report the numerical simulations of wave height,water level and flow variations between dual permeable submergedbreakwaters and the slope seawall. The RANS equations associatedwith RNG turbulent model was applied for the numerical simulationswith CFD. The volume of fluid method was employed to track the freesurface. Dual offshore detached submerged breakwaters with a gap areconfigured in this study. The simulated results showed that the set-upof water level occurred behind submerged breakwaters, which inducesobvious circulations of depth-averaged mean flow between submergedbreakwaters and seawall. On the other hand, due to the wave reflectionfrom the effect of seawall, the spatial periodic variations of waveheight and mean water level behind the submerged breakwater wasfound on the on-offshore direction. The influence of the submergedbreakwaters on the wave run-up height on the seawall was alsoreported in this study.