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Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope
作者姓名:CHEN Jie  JIANG Changbo  HU Shixiong  HUANG Wenwei
作者单位:[1]School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China [2]Hunan Province Key Laboratory of Water, Sediment Sciences & Flood Hazard Prevention, Changsha 410114, China [3]Department of Geography, East Stroudsburg University of Pennsylvania, East Stroudsburg, PA 18301, USA [4]School of Foreign Languages, Changsha University of Science & Technology, Changsha 410114, China
基金项目:The National Natural Science Foundation of China under contract Nos 50979008 and 50909009;;Program for Hunan Province Key Laboratory of Water;;Sediment Sciences & Flood Hazard Prevention and Open Research Fund Program of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University No.2008490911
摘    要:In this study,characteristics of flow field and wave propagation near submerged breakwater on a sloping bed are investigated with numerical model. The governing equations of the vertical twodimensional model are Reynolds Averaged Navier Stokes equations. The Reynolds stress terms are closed by a nonlinear k ε turbulence transportation model. The free surface is traced through the PILC-VOF method. The proposed numerical model is verified with experimental results. The numerical result shows that the wave profile may become more asymmetrical when wave propa-gates over breakwater. When wave crest propagates over breakwater,the anticlockwise vortex may generate. On the contrary,when wave hollow propagates over breakwater,the clockwise vortex may generate. Meanwhile,the influenced zone of vortex created by wave crest is larger than that created by wave hollow. All the maximum values of the turbulent kinetic energy,turbulent dissi-pation and eddy viscosity occur on the top of breakwater. Both the turbulent dissipation and eddy viscosity increase as the turbulent kinetic energy increases. Wave energy may rapidly decrease near the breakwater because turbulent dissipation increases and energy in lower harmonics is transferred into higher harmonics.

关 键 词:传播特性  数值研究  潜堤  流场  Stokes方程  湍流动能  湍流耗散  雷诺平均
收稿时间:2008/12/19 0:00:00
修稿时间:2009/7/14 0:00:00

Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope
CHEN Jie,JIANG Changbo,HU Shixiong,HUANG Wenwei.Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope[J].Acta Oceanologica Sinica,2010,29(1):88-99.
Authors:CHEN Jie  JIANG Changbo  HU Shixiong and HUANG Wenwei
Affiliation:1.School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China;Hunan Province Key Laboratory of Water, Sediment Sciences & Flood Hazard Prevention, Changsha 410114, China2.Department of Geography, East Stroudsburg University of Pennsylvania, East Stroudsburg, PA 18301, USA3.School of Foreign Languages, Changsha University of Science & Technology, Changsha 410114, China
Abstract:In this study, characteristics of flow field and wave propagation near submerged breakwater on a sloping bed are investigated with numerical model. The governing equations of the vertical two-dimensional model are Reynolds Averaged Navier Stokes equations. The Reynolds stress terms are closed by a nonlinear k -ε turbulence transportation model. The free surface is traced through the PILC-VOF method. The proposed numerical model is verified with experimental results. The numerical result shows that the wave profile may become more asymmetrical when wave propagates over breakwater. When wave crest propagates over breakwater, the anticlockwise vortex may generate. On the contrary, when wave hollow propagates over breakwater, the clockwise vortex may generate. Meanwhile, the influenced zone of vortex created by wave crest is larger than that created by wave hollow. All the maximum values of the turbulent kinetic energy, turbulent dissipation and eddy viscosity occur on the top of breakwater. Both the turbulent dissipation and eddy viscosity increase as the turbulent kinetic energy increases. Wave energy may rapidly decrease near the breakwater because turbulent dissipation increases and energy in lower harmonics is transferred into higher harmonics.
Keywords:submerged breakwater  characteristics of flow field  PLIC-VOF method  sloping bed  
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