环状河道二维浅水流动的全隐数值求解方法  

Full implicit numerical method for two-dimensional shallow flows in orbicular river cell

作　　者：向小华[1] 苏长城[2] 吴晓玲[1] 王船海[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]江苏省水利厅规划办公室,江苏南京210029

出　　处：《水科学进展》2008年第6期807-813,共7页Advances in Water Science

基　　金：国家自然科学基金资助项目(50679025)~~

摘　　要：基于通用河网二维水流模式,采用全隐式矩阵追赶与回代技术,提出了环状河道单元二维数值模拟的通用模型。该模型仿照一维河网的建模方法,通过建立节点水位方程组,能方便地实现全流域二维河网或者一二维河网的隐式耦合求解。通过对长江下游南京八卦洲段分汊河道的数值模拟,表明该方法精度较高,切实有效,能满足实际工程的需要。Based on the generic 2D river-network model, a generic numerical model for 2D orbicular river cell is presented by applying the full implicit matrix chase-after method. Aecoreding to the modeling method for 1D river-network, the model estabilishes the equations of water level nodes which can be easily used to realize the 2D river-network and 1D-2D coupling rivernetwork by a implicit way. With the numerical results about Yangtze Rive branch of BAGUA island in NANJING, it can be indicated that the model is effective and valuable.

关 键 词：二维数值模拟 环状河道 全隐式矩阵追赶法 浅水流动 

分 类 号：TV131.4[水利工程—水力学及河流动力学]