Dissipation of Solitary Wave Energy Using Elastic Seawall by Smoothed Particle Hydrodynamics Method

This study employs the incompressible smoothed particle hydrodynamics (ISPH) method to investigate the solitary wave dissipation energy. Smoothed particle hydrodynamics is a numerical method applied to solve fluid/solid field equations. Due to Lagrangian and meshless properties, this method has a high ability to solve free surface and fluid–structure interaction problems. In the present study, the fluid’s equations of motion are solved using ISPH, where Poisson’s equation is utilized to determine the pressure field. Also, the weakly compressible smoothed particle hydrodynamics method is used for solving the solid field equations, where the equation of state is solved to find the pressure. To this end, the developed code is first validated in terms of the solution of fluid and solid fields. Then, the hydrostatic pressure is applied to the seawall using the SPH method and comparing results with solutions obtained from ANSYS software. By solving the problem of solitary wave collision with mass and spring system and comparing the results with those presented by other studies, the accuracy of the force applied to the wall is investigated. Next, two benchmark FSI problems are simulated, including fluid flow under a hypoelastic gate and breaking dam on a hypoelastic baffle. Obtained results indicate the accuracy and validity of the developed code. Finally, the solitary wave collision with an elastic seawall is examined in terms of some parameters, including Young’s modulus, seawall thickness, and wave ratio. Results are presented in diagrams of dimensionless displacement of the seawall and dimensionless wave run-up on the wall.