| A Computational Model for Velocity Separation in Shallow Sea |
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| 作者姓名： | SONG Zhiyao |
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| 作者单位： | 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，Research Institute of Coastal and Ocean Engineering，Hohai University，Nanjing 210098，China |
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| 摘 要： | Based on the hydrodynamical feature and the theoretical velocity profiles of tidal flow and vvind-induced flow in shal-low sea, a computational model is established for the first time, which can separate observed velocity into tidal velocity and wind-induced velocity by use of the least square method. With the model, not only the surface velocities of tidal flow and vvind-induced flow are obtained, but also the bed roughness height is determined and the wind velocity above the wa-ter surface is estimated. For verification of the model, the observed velocity in the Yellow River Estuary and the laborato-ry test is separated, then it is applied to the Yangtze River Estuary. All the results are satisfactory. The research results show that the model is simple in method, feasible in process and reasonable in result. The model is a valid approach to analysis and computation of field dala, and can be applied to separate the observed velocity in shallow sea; at the same time, reasonable boundary conditions of th
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A Computational Model for Velocity Separation in Shallow Sea |
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| SONG Zhiyao YAN Yixin
SHEN Hongyan and KONG Jun
Research Institute of Coastal and Ocean Engineering,Hohai University,Nanjing ,China.A Computational Model for Velocity Separation in Shallow Sea[J].China Ocean Engineering,2002,16(3):407-413. |
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| Authors: | SONG Zhiyao YAN Yixin
SHEN Hongyan and KONG Jun
Research Institute of Coastal and Ocean Engineering Hohai University Nanjing China |
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| Institution: | Research Institute of Coastal and Ocean Engineering, Hohoi University, Nanjing 210098, China Research Institute of Coastal and Ocean Engineering, Hohoi University, Nanjing 210098, China Research Institute of Coastal and Ocean Engineering, Hohoi University, Nanjing 210098, China Research Institute of Coastal and Ocean Engineering, Hohoi University, Nanjing 210098, China |
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| Abstract: | Based on the hydrodynamical feature and the theoretical velocity profiles of tidal flow and vvind-induced flow in shal-low sea, a computational model is established for the first time, which can separate observed velocity into tidal velocity and wind-induced velocity by use of the least square method. With the model, not only the surface velocities of tidal flow and vvind-induced flow are obtained, but also the bed roughness height is determined and the wind velocity above the wa-ter surface is estimated. For verification of the model, the observed velocity in the Yellow River Estuary and the laborato-ry test is separated, then it is applied to the Yangtze River Estuary. All the results are satisfactory. The research results show that the model is simple in method, feasible in process and reasonable in result. The model is a valid approach to analysis and computation of field dala, and can be applied to separate the observed velocity in shallow sea; at the same time, reasonable boundary conditions of the surface and bottom can be obtained for two-and three-dimensional numerical simulation. |
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| Keywords: | shallow sea velocity profile tidal flow wind-induced flow the least square method velocity separation |
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