期刊论文

Numerical investigation of hydrodynamic characteristics of solitary wave over permeable fringing reef

中文

水动力学研究与进展A辑

1000-4874

2021

36

02

180-191

10.16076/j.cnki.cjhd.2021.02.004

51809021:国家自然科学基金 51839002:国家自然科学基金 2020JJ5582:国家自然科学基金 2019A024:湖南省教育厅科学研究重点项目

本校为第一机构

该文为研究孤立波在透水岸礁上传播变形的水动力特性,采用非静压单相流模型,通过设计工况系统分析了孤立波在可透水礁上沿礁传播的变化规律。结果表明:透水层的存在显著降低了孤立波所具有的动能和在礁坪上的速度,也使破碎后的自由液面振荡加剧,最终导致自由液面高度上升;透水层的孔隙率和颗粒的中值粒径对水动力特性影响可忽略不计;入射波高越大,礁坪透水层对波浪消减作用越显著;礁坪水深增大,礁坪上自由液面高度也相应增大;礁坪透水层的存在对波浪反射和透射存在影响。该研究结果为进一步认识珊瑚礁对海啸破坏性的消减和近岸水利工程防护提供了相关参考。

In this paper, hydrodynamic characteristics of transformation of solitary over permeable fringing reef are numerically investigated by applying a non-hydrostatic model named NHWAVE. Effects of prominent factors, such as wave height, water depth, thickness, median diameter and porosity of the permeable layer of fringing reef on the hydrodynamic characteristics of solitary wave over permeable fringing reef are discussed in details. It is found that the existence of the permeable layer can significantly dissipate the kinematic energy and slow down the propagation speed of the surge bore induced b...