Numerical study on the characteristics of flow field and wave propagation near submerged breakwater on slope

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• 作者：Jie Chen (1) (2)
  Changbo Jiang (1) (2)
  Shixiong Hu (3)
  Wenwei Huang (4)
  
• 关键词：submerged breakwater ; characteristics of flow field ; PLIC ; VOF method ; sloping bed
• 刊名：Acta Oceanologica Sinica
• 出版年：2010
• 出版时间：January 2010
• 年：2010
• 卷：29
• 期：1
• 页码：88-99
• 全文大小：1807KB
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• 作者单位：Jie Chen (1) (2)
  Changbo Jiang (1) (2)
  Shixiong Hu (3)
  Wenwei Huang (4)
  
  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
  
• ISSN：1869-1099

文摘

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 ?? 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.