抄録
Two methods to calculate the wave deformation around a breakwater, the boundary element method and mild-slope equation method, are currently available. Their abilityto predict the flow velocity field in the field, however, is not known. In this paper, a detailed measurement of flow velocity both around and inside a porous submerged breakwater is carried out in the laboratory wave flume and the result is compared with the analytical calculation.
Experimental result shows amplification of flow velocity over the submerged breakwater and existence of complicated, though small, flow velocity inside the breakwater. For this flow structure, an unsteady mild- slope equation is formulated and the calculated flow velocity is shown to agree with the experimental data.
