Wave Reflection from Partially-Perforated-Wall Caisson Breakwater

Abstract

In 1995, Suh and Park developed a numerical model that computes the reflection of regular waves from a fully-perforated-wall caisson breakwater. This paper describes how to apply this model to a partially-perforated-wall caisson and irregular waves. To examine the performance of the model, existing experimental data are used for regular waves, while a laboratory experiment is conducted in this study for irregular waves. The numerical model based on a linear wave theory tends to over-predict the reflection coefficient of regular waves as the wave nonlinearity increases, but such an over-prediction is not observed in the case of irregular waves. For both regular and irregular waves, the numerical model slightly over- and under-predicts the reflection coefficients at larger and smaller values, respectively, because the model neglects the evanescent waves near the breakwater.