Wave Reflection from a Slit-type Breakwater having Diamond-shape Cylinders as a Front Wall

Abstract

Wave left-lettlection from a slit-type breakwater having diamond-shape or circular-shape cylinders as a front wall is obtained theoretically and experimentally. A method of a previous study where the matched asymptotic expansions was employed is used. The blockage coefficient for the diamond-shape cylinders which has not been gotten yet is obtained by using the Boudary Integral Method (BIM). The value of the energy loss coefficient for the cylinders is decided after comparison of theoretical values with experimental data. The left-lettlection coefficients for the slit-type breakwater with diamond-shape and circular-shape cylinders calculated from the present method agree with experimental data, as are those for the one with square cylinders. The difference in the characteristics of the left-lettlection coefficients of a slit-type breakwater having diamondshape, circular-shape, and square-shape cylinders is discussed.