| Numerical Simulation of Wave Scour Around A Large-Scale Circular Cylinder |
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| 作者姓名： | ZHAO Ming |
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| 作者单位： | Stake Key Laboratory of Coastal and Offshore Engineering.Dalian University of Technology，Dalian 116024，China，Stake Key Laboratory of Coastal and Offshore Engineering.Dalian University of Technology，Dalian 116024，China，Stake Key Laboratory of Coastal and Offshore Engineering.Dalian University of Technology，Dalian 116024，China |
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| 摘 要： | A numerical model is developed for estimation of local scour around a large circular cylinder under vvave action. The model includes wave diffraction around structures, bed shear stress calculation inside the vvave boundary layer and topo-graphical change model. The vvave model is based on the improved Boussinesq equations for varying depth. The vvave boundary layer is calculaled by solving the integrated momentum equation over the boundary layer. The bed shear stress due to streaming, an important factor affecting the sediment transport around a large-scale cylinder, is calculated. The Lagrangian drift velocity is included in calculation of the suspended sediment transport rates. The model is implemented by a finite element method and the results from the present model, which agree well with experimental data, are com-pared vvith those from other methods.
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Numerical Simulation of Wave Scour Around A Large-Scale Circular Cylinder |
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| ZHAO Ming,TENG Bin and LIU Shu-xue
Stake Key Laboratory of Coastal and Offshore Engineering. Dalian University of Technology,Dalian ,China.Numerical Simulation of Wave Scour Around A Large-Scale Circular Cylinder[J].China Ocean Engineering,2002,16(4):513-523. |
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| Authors: | ZHAO Ming TENG Bin and LIU Shu-xue
Stake Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian China |
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| Institution: | Stake Key Laboratory of Coastal and Offshore Engineering.Dalian University of Technology, Dalian 116024 , China Stake Key Laboratory of Coastal and Offshore Engineering.Dalian University of Technology, Dalian 116024 , China Stake Key Laboratory of Coastal and Offshore Engineering.Dalian University of Technology, Dalian 116024 , China |
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| Abstract: | A numerical model is developed for estimation of local scour around a large circular cylinder under vvave action. The model includes wave diffraction around structures, bed shear stress calculation inside the vvave boundary layer and topo-graphical change model. The vvave model is based on the improved Boussinesq equations for varying depth. The vvave boundary layer is calculaled by solving the integrated momentum equation over the boundary layer. The bed shear stress due to streaming, an important factor affecting the sediment transport around a large-scale cylinder, is calculated. The Lagrangian drift velocity is included in calculation of the suspended sediment transport rates. The model is implemented by a finite element method and the results from the present model, which agree well with experimental data, are com-pared vvith those from other methods. |
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| Keywords: | local scour Boussinesq eguations numerical simulation circular cylinder |
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