Study On Hydrodynamics Of Multifunctional Permeable Breakwater

Breakwater is a common building in coastal engineering and an important component of coastal ports.It has abilities of resisting waves,guaranteeing the stability of the harbor waters,and provide safe and stable conditions for the construction and the operation of ships in the harbor.Compared with traditional sloping breakwaters and upright breakwaters,permeable breakwater has the advantages of low cost,quick construction,easy demolition,and flow permeable.In addition,on the premise of ensuring the depth of water in the harbor,the inner side of the permeable breakwater can also serve as a dock for ships.In this paper,Open FOAM softwaer and physical model experiments are used to study the hydrodynamic characteristic of the open type breakwater with baffles.A numerical wave flume is set up based on the waves2 Foam toolbox of OpenFOAM.The performance of the numerical wave flume is tested and verified with the typical case of wave interaction with a thin vertical barrier and Π-type breakwater.A simple model test about baffle breakwater is conducted in the physical wave flume in the State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology.The water surface evaluation,the wave pressure on the baffle and the velocity of the water beneath the baffle are measured and analyzed.Numerical simulation about the wave interaction with baffle breakwater is explored.The comparison of the surface evaluation,wave pressure distribution and the velocity of water movement are presented with a relatively good agreement.The sheltering performance of the baffle breakwater is discussed alone with the relative width,relative submerged depth and the arrangement of baffles.The variations of the transmission coefficient with relative width are presented also.