Abstract
ABSTRACTA numerical model for nonlinear wave propagation over a rectangular step is formulated by utilizing the boundary element method. The computation by this model gives a more realistic wave profile than that of linear wave theory. The model is used for study of the formation of higher harmonic components in the process of wave propagation over the step. In comparison with the results of laboratory experiments, the model gives good estimation of the amplitudes of the second and third harmonic components, and gives a over-prediction of the first harmonic component. Reflection and transmission coefficients are calculated by including these harmonic components in the computation of wave height. The model yields the coefficients in good agreement with the experimental results.In addition to the analysis of harmonic components, the energy loss in the process of wave propagation over the step was experimentally investigated. A Fiber Laser Velocimeter is used to measure the water particle velocity at about f...
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