Numerical Study on the Hydraulic Performance of Submerged Porous Breakwater under Solitary Wave Attack

The hydraulic performance of horizontally slotted submerged porous breakwater under solitary wave attack is investigated with the use of a well-validated two-dimensional model based on solving the Reynolds-Averaged Navier-Stokes (RANS) equations. A set of numerical experiments with various porosity, P, values are performed to evaluate the hydraulic performance of submerged breakwater in terms of the wave reflection, transmission, and dissipation coefficients. A comparison between the different methods for calculating the coefficients is also presented. The effect of porosity, P, values on the wave characteristics for an engineering application are calculated and discussed. For the sets of numerical experiments, only the weakly nonlinear solitary waves H/h=0.10 are considered. The solitary waves can be considered good representations of tsunami, storm surge and nonlinear shallow water waves.