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Wave refraction-diffraction effect in the wind wave model WWM

机译:风波模型WWM中的波折射-衍射效应

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摘要

Based on the extended mild-slope equation, the wind wave model (WWM; Hsu et al., 2005) is modified to account for wave refraction, diffraction and reflection for wind waves propagating over a rapidly varying seabed in the presence of current. The combined effect of the higher-order bottom effect terms is incorporated into the wave action balance equation through the correction of the wavenumber and propagation velocities using a refraction-diffraction correction parameter. The relative importance of additional terms including higher-order bottom components, the wave-bottom interaction source term and wave-current interaction that influence the refraction-diffraction correction parameter is discussed. The applicability of the proposed model to calculate a wave transformation over an elliptic shoal, a series of parallel submerged breakwater induced Bragg scattering and wave-current interaction is evaluated. Numerical results show that the present model provides better predictions of the wave amplitude as compared with the phase-decoupled model of Holthuijsen et al. (2003).
机译:基于扩展的缓坡方程,对风波模型(WWM; Hsu等人,2005)进行了修改,以解决在存在电流的情况下在快速变化的海床上传播的风波的折射,衍射和反射问题。通过使用折射-衍射校正参数校正波数和传播速度,将高阶底部效应项的组合效果合并到波动作用平衡方程中。讨论了其他项的相对重要性,这些项包括影响折射-衍射校正参数的高阶底部分量,波底相互作用源项和波电流相互作用。该模型适用于计算椭圆形浅滩上的波浪变换,评估了一系列平行淹没式防波堤引起的布拉格散射和波流相互作用。数值结果表明,与Holthuijsen等人的相位解耦模型相比,本模型可以更好地预测波幅。 (2003)。

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