点击次数：

论文类型：期刊论文

发表时间：2009-05-01

发表刊物：COASTAL ENGINEERING

收录刊物：SCIE、EI

卷号：56

期号：5-6

页面范围：672-687

ISSN号：0378-3839

关键字：Boussinesq equations; Bragg reflection; Mild slope assumption

摘要：Enhancements for the Bragg reflection are introduced for three sets of 2D higher order Boussinesq equations to improve the prediction of the Bragg reflection. The extension of the approach to other sets of Boussinesq equations is discussed. The analytical solutions for the Bragg reflection over an infinite number of sinusoidal bars are derived for these Boussinesq models and compared to the exact theoretical solution in order to determine the optimized values of the parameters in the new enhancement terms. Numerical simulations are also carried out for the Bragg reflection over a finite number of sand bars and compared with corresponding measurements to validate the enhancements. Comparisons with other forms of Boussinesq models are made to discuss the applicability of different forms of Boussinesq models to rapidly varying topography with sand bars. The effects of the mild slope assumption on the prediction of Bragg reflection and of wave reflection on a plane self are also discussed. (C) 2009 Elsevier B.V. All rights reserved.