| Three Dimensional Baroclinic Numerical Model for Simulating Fresh and Salt Water Mixing in the Yangtze Estuary |
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| 作者姓名： | ZHENG Jinhai |
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| 作者单位： | Research Institute of Coastal and Ocean Engineering，Hohai University，Research Institute of Coastal and Ocean Engineering，Hohai University，Research Institute of Coastal and Ocean Engineering，Hohai University Nanjing 210098，China，Nanjing 210098，China，Nanjing 210098，China |
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| 摘 要： | For simulating fresh and salt water mixing in estuaries, a three dimensional nonlinear baroclinic numerical model is developed, in which the gradients of horizontal pressure contain the gradient of barotropic pressure arising from the gradi-ent of tidal level and the gradient of baroclinic pressure due to the gradient of salinity. The Eulerian-Lagrangian method is employed to descretize both the momentum equations of tidal motion and the equation of salt water diffusion so as to im-prove the computational stability and accuracy. The methods to provide the boundary conditions and the initial conditions are proposed, and the criterion for computational stability of the salinity fields is presented. The present model is used for modeling fresh and salt water mixing in the Yangtze Estuary. Computations show that the salinity distribution has the characteristics of partial mixing pattern, and that the present model is suitable for simulalion of fresh and salt waler mixing in ihe Yanglze Esluary.
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Three Dimensional Baroclinic Numerical Model for Simulating Fresh and Salt Water Mixing in the Yangtze Estuary |
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| ZHENG Jinhai,YAN Yixin and ZHU Yuliang
Research Institute of Coastal and Ocean Engineering,Hohai University,Nanjing ,China.Three Dimensional Baroclinic Numerical Model for Simulating Fresh and Salt Water Mixing in the Yangtze Estuary[J].China Ocean Engineering,2002,16(2):227-238. |
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| Authors: | ZHENG Jinhai YAN Yixin and ZHU Yuliang
Research Institute of Coastal and Ocean Engineering Hohai University Nanjing China |
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| Institution: | Research Institute of Coastal and Ocean Engineering, Hohai University, Nanjing 210098, China Research Institute of Coastal and Ocean Engineering, Hohai University, Nanjing 210098, China Research Institute of Coastal and Ocean Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | For simulating fresh and salt water mixing in estuaries, a three dimensional nonlinear baroclinic numerical model is developed, in which the gradients of horizontal pressure contain the gradient of barotropic pressure arising from the gradi-ent of tidal level and the gradient of baroclinic pressure due to the gradient of salinity. The Eulerian-Lagrangian method is employed to descretize both the momentum equations of tidal motion and the equation of salt water diffusion so as to im-prove the computational stability and accuracy. The methods to provide the boundary conditions and the initial conditions are proposed, and the criterion for computational stability of the salinity fields is presented. The present model is used for modeling fresh and salt water mixing in the Yangtze Estuary. Computations show that the salinity distribution has the characteristics of partial mixing pattern, and that the present model is suitable for simulalion of fresh and salt waler mixing in ihe Yanglze Esluary. |
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| Keywords: | fresh and salt water mixing numerical model baroclinic pressure Eulerian-Lagrangian method Yangtze Estuary |
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