Effect of RN number on the dissipation performance of twin-plate breakwater

Abstract Previous studies have shown that the twin-plate breakwater has good performance in wave dissipation, in particular under deep water conditions. The performance of twin-plate breakwater is subjected to several parameters and some of these parameters are coupled to the others. Thus far, there was no simple and effective method to calculate the dissipation coefficient of the twin-plate breakwater. The objective of the present study is to address the mechanism of wave dissipation and apply the developed RN number to evaluate the dissipating performance on the twin-plate breakwater. The experimental results showed that the transmission, reflection and dissipation coefficients were strongly depending on the developed RN number. Based on various data fitting, an optimal empirical equation is obtained to predict the dissipation of the twin-plate breakwater through the developed RN number. The empirical equation has been verified by the Chi-square test and hence can be used for bulk estimation for transmission coefficient under normal and oblique waves.