波生沿岸流的数值模拟研究  

Numerical Simulation of Longshore Currents Induced by Waves

作　　者：汪鸿[1] 李训强[1] 朱首贤[2] 张文静[1] 

机构地区：[1]解放军理工大学气象海洋学院,江苏南京211101 [2]河海大学海洋学院,江苏南京210098

出　　处：《海洋科学进展》2016年第4期507-515,共9页Advances in Marine Science

基　　金：国家自然科学基金项目--引入波浪漫滩边界的近岸海域悬沙输运数值模式及其应用(41076048);中央高校基本科研业务费专项项目--流和温盐垂向异结构的新型海洋模式研制及其应用(2011B05714)

摘　　要：采用完全非线性Boussinesq方程建立的FUNWAVE模型进行波生沿岸流数值模拟研究,通过对不同斜坡地形和波浪入射条件下波生流的物理模型实验结果进行比较,验证了该数值模型能较准确地计算沿岸流;通过改变波浪的不同入射条件,对不同入射条件的沿岸流数值模拟得出:当其他条件不变时,仅入射波高增大时,沿岸流的流幅和幅值增大,幅值位置向深水移动;仅增大入射周期时,沿岸流的流幅显著增加,幅值的增加较小;斜坡地形坡度的改变能显著影响波生沿岸流的流幅和幅值,但对沿岸流幅值位置的水深影响不大。采用窄缝法处理动边界时,选择合适的窄缝起始水深对沿岸流的准确计算是十分必要的。The FUNWAVE model based on nonlinear Bosssinesq equations is employed to simulate the longshore current induced by waves.Comparison with the experimental results of physical model show that the FUNWAVE model can well simulate the longshore currents.The model is further employed to the simulate longshore current on different slopes,with varying heights and periods,and results show that when incident height or period increases,the magnitude and width of the longshore current will also increase,and the location of maximum longshore current moves towards deeper water as incident height increases.When terrain slope changes,the magnitude and width change significantly but the location of maximum longshore current does not change.FUNWAVE model adopts slot technique to deal with transient boundary,the initial depth of slot technique has an important impact on the longshore current simulation.

关 键 词：沿岸流 数值模拟 BOUSSINESQ方程 窄缝法 

分 类 号：P731[天文地球—海洋科学]