| 2-D Current Field Numerical Simulation Integrating Yangtze Estuary with Hangzhou Bay |
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| 作者单位： | HU Kelin DING Pingxing ZHU Shouxian and CAO Zhenyi
1 Graduate Student，State Key Laboratory of Estuarine and Coastal Research，East China Normal University，Shanghai 200062，P. R. China
2 Professor，State Key Laboratory of Estuarine and Coastal Research，East China Normal University，Shanghai 200062，P. R. China |
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| 摘 要： | —In this paper,integrating the Yangtze Estuary with the Hangzhou Bay,a 2-D velocity fieldmodel is established.In the model,fine self-adaptive grids are employed to adapt to the complicated coast-al shape.The hydrodynamic equations satisfied by two contravariant components of velocity vector andsurface elevation in non-orthogonal curvilinear coordinates are used.In each momentum equation thecoefficients before the two partial derivatives of surface elevation with respect to variables of alternative di-rection coordinates have different orders of magnitude,i.e.,the derivative with the larger coefficient mayplay a more important role than that with the smaller one.With this advantage,the ADI scheme can beeasily employed.The hydrodynamic factors include tidal current,river runoff and wind-induced current.In terms of tidal current,seven main constituents in the area are considered in the open boundaries.Theverifications of surface elevation process and current velocity process in the spring tide and in the n
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2-D Current Field Numerical Simulation Integrating Yangtze Estuary with Hangzhou Bay |
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| Authors: | HU Kelin |
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| Abstract: | In this paper, integrating the Yangtze Estuary with the Hangzhou Bay, a 2-D velocity field model is established. In the model, fine self-adaptive grids are employed to adapt to the complicated coastal shape. The hydrodynamic equations satisfied by two contravariant components of velocity vector and surface elevation in non-orthogonal curvilinear coordinates are used. In each momentum equation the coefficients before the two partial derivatives of surface elevation with respect to variables of alternative direction coordinates have different orders of magnitude, i. e., the derivative with the larger coefficient may play a more important role than that with the smaller one. With this advantage, the ADI scheme can be easily employed. The hydrodynamic factors include tidal current, river runoff and wind-induced current. In terms of tidal current, seven main constituents in the area are considered in the open boundaries. The verifications of surface elevation process and current velocity process in the spring tide and in the neap tide show that the model can preferably reflect current fields in the area. Through the simulation of Lagrangian residual current fields in summer and in winter, the paths of the exchange of water and sediment between the Yangtze Estuary and the Hangzhou Bay are elementarily discussed. |
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| Keywords: | Yangtze Estuary Hangzhou Bay current field self-adaptive grids numerical simulation |
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