Analysis Influence of Initial Wave Amplitude and Slope of the Seabed on the Energy of Breaking Waves with OpenFOAM

Abstract The breaking wave is one example of fluid dynamics in the case of multiphase flow that is important to study. This study uses OpenFOAM CFD software to study the effect of seabed slope and wave amplitude on breaking wave energy. OpenFOAM is used to solve the Navier-Stokes equation using the finite volume and volume of fluid methods. In both ways, the mesh is divided into partitions containing information such as liquid phase, internal energy, and pressure. First, we validated the code by simulating the experimental study of breaking waves. The simulation was carried out by compiling code with OpenFOAM software. The simulation results are then compared with the experimental results. Comparisons are made by finding the RMSE value between the simulation and experimental results. The results showed good validity between the simulations and the comparison experiments conducted by available data. This is indicated by the RMSE (Root Mean Square Error) values of 0.028, 0.006, and 0.017. Then, we simulated the breaking wave with varying initial wave amplitude and seabed slope. The results of the variation of wave amplitude show that the larger the initial wave is given, the greater the breaking wave energy produced. Variations in the seabed slope indicate that the seabed slope is the main factor determining the type of breaking wave that will be formed.