Numerical Study on Breaking Wave Interaction with Vertical Wall Attached with Recurved Parapet

Abstract

This paper numerically investigates breaking wave interaction with a vertical wall attached with a recurved parapet in 1:8 model scale, as part of the ISOPE-2022 comparative study. The in-house CFD solver naoe-FOAM-SJTU based on the open source platform OpenFOAM is used to perform all simulations. For wave generation, a novel generating-absorbing boundary condition (GABC) is adopted to replace the time-consuming moving boundary wavemaker. A geometric volume-of-fluid (VOF) method based on piecewise-linear interface calculation (PLIC) is incorporated in the present numerical model to capture the sharp interface and improve the accuracy of the predicted impact pressure. The time history and frequency analysis of the wave elevation and pressure at each probe are compared with the experimental data. The comparison demonstrates that the present numerical model is able to predict the impact pressure with sufficient accuracy but gives less accurate results of wave elevation. Moreover, the evolutions of free surface, pressure, and vorticity distribution are further provided to achieve a better understanding of this complex wave-structure interaction issue as a good complement to the experiments.