Smoothed particle hydrodynamics for enhanced coastal protection: A study on wave dynamics and Bragg resonance over different topographic conditions

This study explores the application of the smoothed particle hydrodynamics (SPH) method in simulating Bragg resonant reflection of surface waves to enhance coastal protection strategies. Using the DualSPHysics model, the research investigates the hydrodynamic characteristics of wave interactions with periodic and island reef topographies. The results demonstrate that periodic topographies exhibit stronger wave reflection capabilities compared to island reefs, particularly under resonant conditions, leading to significantly reduced wave heights and impact pressures. This study underscores the potential of SPH, as a comprehensive particle-based model, in advancing coastal engineering and ecological protection. The assessment is based on regular wave conditions in a controlled setting. To improve the accuracy and applicability, future research should consider random wave conditions and diverse marine climate scenarios.