Wave Energy Dissipation in Arbitrarily Shaped Harbours of Variable Depth

摘要

A finite element model for combined refraction-diffraction problems of linear water waves has been extended to include the effect of various dissipative mechanisms on wave excitation response in harbors of arbitrary shape and variable depth. Especially, the effects of bottom friction, partial absorption along the harbor contours, and transmission through permeable breakwaters have been considered. Although, within the mild slope approximation, the model is valid for arbitrary wave lengths, in the paper its effectiveness for harbor design applications is demonstrated for long wave induced resonance phenomena. For this purpose a realistic harbor geometry has been selected. A hydraulic scale-model of the harbor enabled experimental verification of the computational results.