Numerical investigation of wave interaction and breaking near a wedge shape submerged reef

Ministry of Earth Science, india successfully implemented a wedge-shaped artificial reef to restore and protect the lost beach at Puducherry coast. The performance of the reef is monitored by measuring the beach profiles and bathymetry periodically near the reef to estimate the quantity of beach formation. Numerical studies are also carried out for the site conditions to investigate the wave interaction and breaking near the reef. Multi-phase numerical models are developed using Computational Fluid Dynamics (CFD) based open source tool OpenFOAM and RANS based multiphase k-ε and Buoyancy modified k-ω SST models are implemented and compared with the default turbulence models for their performance in wave propagation and breaking. Default k-ε model predicts excessive effective dynamic viscosity at interface due to unaccount of density variation in the model and the wave height is reduced while simulation is progressing compared to the other two models.