| NUMERICAL SIMULATION OF TWO-DIMENSIONAL OVERTOPPING AGAINST SEAWALLS ARMORED WITH ARTIFICIAL UNITS IN REGULAR WAVES |
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| 作者姓名： | LU Yong-jin LIU Hua WU Wei ZHANG Jiu-shan |
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| 作者单位： | LU Yong-jin School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiaotong University，Shanghai 200030，China Shanghai Hydraulic Engineering Design and Research Institute，Shanghai 200063，China LIU Hua，WU Wei，ZHANG Jiu-shan School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiaotong University，Shanghai 200030，China |
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| 摘 要： | A new mathematical model for the overtopping against seawalls armored with artificial units in regular waves was established. The 2-D numerical wave flume, based on the Reynolds Averaged Navier-Stokes (RANS) equations and the standard k-ε turbulence model, was developed to simulate the turbulent flows with the free surface, in which the Volume Of Fluid (VOF) method was used to handle the large deformation of the free surface and the relaxation approach of combined wave generation and absorbing was implemented. In order to consider the effects of energy dissipation due to the armors on a slope seawall, a porous media model was proposed and implemented in the numerical wave flume. A series of physical model experiments were carried out in the same condition of the numerical simulation to determine the drag coefficient in the porous media model in terms of the overtopping discharge. Compared the computational value of overtopping over the seawall with the experimental data, the values of the effective drag coefficient was calibrated for the layers of blocks at different locations along the seawalls.
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| 关 键 词： | 多孔渗水介质 防波堤 二维数字波浪水槽 规则波 数值模拟 |
| 收稿时间： | 31 May 2006 |
| 修稿时间： | 2006-05-312006-09-28 |
NUMERICAL SIMULATION OF TWO-DIMENSIONAL OVERTOPPING AGAINST SEAWALLS ARMORED WITH ARTIFICIAL UNITS IN REGULAR WAVES |
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| LU Yong-jin LIU Hua WU Wei ZHANG Jiu-shan.NUMERICAL SIMULATION OF TWO-DIMENSIONAL OVERTOPPING AGAINST SEAWALLS ARMORED WITH ARTIFICIAL UNITS IN REGULAR WAVES[J].Journal of Hydrodynamics,2007,19(3):322-329. |
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| Authors: | LU Yong-jin LIU Hua WU Wei ZHANG Jiu-shan |
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| Affiliation: | 1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China;2. Shanghai Hydraulic Engineering Design and Research Institute, Shanghai 200063, China;1. Department of Structural Engineering, University of California, San Diego, 9500 Gilman Drive, Mail Code 0085, La Jolla, CA 92093, USA;2. National CAD Support Software Engineering Research Center, Huazhong University of Science and Technology, Wuhan 430074, China;3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;1. Department of Civil Engineering, The British University in Egypt, Cairo, Egypt;2. CUFE-BE Research Group: http://eng.cu.edu.eg/postgraduate-portal/research-groups, Department of Structural Engineering, Cairo University, Giza, Egypt;3. Supreme Council of Universities, Egypt |
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| Abstract: | A new mathematical model for the overtopping against seawalls armored with artificial units in regular waves was established. The 2-D numerical wave flume, based on the Reynolds averaged Navier-Stokes (RANS) equations and the standard κ-ɛ turbulence model, was developed to simulate the turbulent flows with the free surface, in which the Volume Of fluid (VOF) method was used to handle the large deformation of the free surface and the relaxation approach of combined wave generation and absorbing was implemented. In order to consider the effects of energy dissipation due to the armors on a slope seawall, a porous media model was proposed and implemented in the numerical wave flume. A series of physical model experiments were carried out in the same condition of the numerical simulation to determine the drag coefficient in the porous media model in terms of the overtopping discharge. Compared the computational value of overtopping over the seawall with the experimental data, the values of the effective drag coefficient was calibrated for the layers of blocks at different locations along the seawalls. |
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| Keywords: | porous media overtopping seewall armored units 2-D numerical wave flume regular waves |
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