DEVELOPMENT OF A HIGHLY DISSIPATIVE BREAKWATER WITH VERTICAL MIXING FUNCTIONS

摘要

In this study, an offshore facility that aims sea water mixing and diffusion along the vertical direction in a semi-enclosed bay is intended for development through the use of wave energy as a driving force. A water chamber type breakwater comprised of a row of vertical walls of different drafts and a submerged horizontal plate was proposed as a typical structure in order to be able to utilize piston mode wave resonances and resultant vortex generations for the effective vertical mixing. Especially, a wedge section of the front wall was adopted to induce the mean flow along the vertical direction of the structure as a resultant effect of asymmetrically generated vortex flows at the mouth of the water chamber. Additional function of the structure as a breakwater was also examined.