Vol.23, No.2, 2023, pp. 213–220
UDC:

Wave breakers are one of the means used to protect and prevent the coastline, infrastructure, and human life from the risks of waves. With this in mind, a numerical study has been carried out of a breaking wave caused by a water dam breaking through a rectangular wave breaker composed of four successive porous media arranged in order of increasing Darcy number (reflecting the porosity) and then in decreasing order. The objective of the paper is to study numerically the profile of the free surface of water, the pressure, and pressure on the outer wall of the model, as well as the velocity field. The two-phase flow (VOF) model has been used to describe the deformation of the free surface. The equations are presented and solved numerically using the finite element method. According to the obtained numerical results, for the wave breaker with decreasing porosity panels, the wave caused by the break of the dam reaches the outer wall earlier, so that the equilibrium is reached earlier than the wave passing through the wave breaker with decreasing porosity and that the velocities are relatively higher. For the wave breaker with decreasing porosity, the pressures exerted on the outer wall by the wave are more important.

Keywords: wave breaker, VOF method, dam-break, porous breakwater, wave interaction