Non-Hydrostatic Numerical Model of Bragg Resonance on Periodically Submerged Breakwater

The Bragg resonance (BR) of a reflection coefficient resulting from the propagation monochronic waves over periodically submerged breakwater was studied using non-hydrostatic numerical model SWASH (Simulating WAves till SHore). occurs when incident wavelength is approximately twice structural length periodic according to Bragg’s law and conditions. This study aimed investigate dynamics at water depths 0.2, 0.3, 0.4 m as number their wavelengths changed. Specifically, this focused on point occurrence ratio two incoming (2S/L). Regular were propagated breakwaters, with increasing 1 2 0.2 intervals. results showed that resonances rapidly increase in value depth decreases, but do not shift breakwaters increases. However, shifts leftward 2S/L increases, slight shallower depths. More wave energy reflected increases compared differences values are associated changes breakwater. Additionally, influenced by both length. causes Resulted deviate Expected resonance, which could be reason why does mainly occur 2S/L=1, stated law.