Numerical Study of Solitary Wave Interaction with Double Submerged Barriers

We present a numerical study on the interaction of solitary wave and a submerged dual-barrier system. The proposed model solves the Reynolds-Averaged Navier-Stokes equations and employs the non-linear k-epsilon turbulence closure scheme to the Reynolds stresses. The volume of fluid technique is utilized to trace the free surface motion. Double barriers, put bottom-mounted vertically on a flat seafloor and also paralleled to each other, are considered as wave absorber and against solitary waves. We conduct a total of twelve combinations of numerical simulation via altering the horizontal distance between two individual barriers. The modeled results are used to discuss the variations on the free surface motion of breaking waves and the hydrodynamic behaviors of the induced main vortices. In addition, the hydraulic performances of submerged dual-barrier system under solitary wave forcing are evaluated using the energy integral method. The calculated results reveal that the optimal horizontal distance between two submerged barriers is approximately 2.5 times of the given water depth for present wave condition and obstacle geometry.