| CHEN Jie,JIANG Changbo,HU Shixiong,HUANG Wenwei. 2010. Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope. Acta Oceanologica Sinica, (1):88－99 |
| Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope |
| Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope |
| Received:December 19, 2008 Revised:July 14, 2009 |
| DOI：10.1007/s13131-010-0011-5 |
| Key words:submerged breakwater characteristics of flow field PLIC-VOF method sloping bed |
| 中文关键词: submerged breakwater characteristics of flow field PLIC-VOF method sloping bed |
| 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. |
| Author Name | Affiliation | E-mail | | CHEN Jie | 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, China | chenjie166@yahoo.com.cn | | JIANG Changbo | 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, China | | | HU Shixiong | Department of Geography, East Stroudsburg University of Pennsylvania, East Stroudsburg, PA 18301, USA | | | HUANG Wenwei | School of Foreign Languages, Changsha University of Science & Technology, Changsha 410114, China | |
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| 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 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 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. |
| 中文摘要: |
| 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 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. |
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