垂向二维潮流数值模型及其在长江口北槽的应用  

A Two-dimensional Vertical Numerical Model of Tidal Flow and Its Application to the North Passage of the Changjiang River Estuary

作　　者：时钟[1] 李世森[1] 

机构地区：[1]上海交通大学港口与海岸工程系,上海200030

出　　处：《海洋通报》2003年第3期1-8,共8页Marine Science Bulletin

基　　金：国家自然科学基金(49806005);国家教育部跨世纪优秀人才培养计划基金[教技函(1999)2 号];国家杰出青年科学基金(40225014)资助

摘　　要：应用变网格有限元方法，采用任意四边形等参单元，离散横向积分的 Navier-Stokes 方程，建立河口潮流垂向二维数学模型。应用此模型，对长江口北槽水域两个观测站的潮流水位、流速垂线分布和整个北槽潮流流速纵向分布进行了模拟。潮流水位、流速垂线分布的模拟值分别与观测站的实测值可以较为吻合，证明了本文模型的实用有效。模拟得到的涨急、落急时刻整个北槽潮流流速纵向分布给出了定性的结果。:A two-dimensional vertical finite element model of estuarine tidal flow has been established by laterally integrating Navier-Stokes equation. To this end, the moving grids finite element method has been used. An arbitrarily shaped quadrilateral element has been selected. This model has been validated by using field data from two monitoring stations at the North Passage of the Changjiang River estuary. Using this numerical model, two types of modeled results have been obtained: ( 1 ) vertical profiles of tidal current velocities at two stations; ( 2 ) longitudinal distributions of tidal current velocities at the North Passage of the Changjiang River estuary. It is suggested that there could be a reasonable agreement between modeled and observed results for tidal elevations and vertical profiles of tidal current velocities.

关 键 词：垂向二维 潮流 有限元 长江口 

分 类 号：U658.93[交通运输工程—港口、海岸及近海工程]