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《Oceanologia Et Limnologia Sinica》 1993-01
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Xu Pengzhu, Mao Rui(Nanjing Institute of Geography and Limnology, Academia Sinica, Nanjing 210008)  
This elliptic body-fitted curvilinear coordinate system is designed to precisely fit the irregular water-land boundary of flow field in the south channel (from Qiyakou to Hengsha) of the Changjiang Estuary and for finite difference computation in a rectangular mesh, by using the numerical grid generation technique proposed by Thompson, and the 2-D hydrodynamic model which integrated over the vertical of shallow water is established in the system. As on the Yanenko operator-splitting method, the equations of the model are split into two couples of 1-D eqs. along 2-axis directions, and each eqs. are solved by FDM. In the computation a "condensation" technique is used and the problem of moving boundary computation is simplified. Numerical smoothing is used to improve the computational stability. The model computed values of tidal elevation, flow velocity and discharge, etc., agree well with field measurements.
【Fund】: 国家自然科学基金委重大项目(No.9488007);; 中国科学院重大项目(No.87-45-03)联合资助
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