Regular wave propagation on 3-D local permeable seabed by higher-order boundary element method

Zhang Xu; Gou Ying; Ni Yunlin; Teng Bin; Liu Zhen

doi:10.3969/j.issn.0253-4193.2016.01.013

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Zhang Xu, Gou Ying, Ni Yunlin, Teng Bin, Liu Zhen. Regular wave propagation on 3-D local permeable seabed by higher-order boundary element method[J]. Haiyang Xuebao, 2016, 38(1): 133-142. doi: 10.3969/j.issn.0253-4193.2016.01.013

Citation:

Zhang Xu, Gou Ying, Ni Yunlin, Teng Bin, Liu Zhen. Regular wave propagation on 3-D local permeable seabed by higher-order boundary element method[J]. Haiyang Xuebao, 2016, 38(1): 133-142. doi: 10.3969/j.issn.0253-4193.2016.01.013

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Regular wave propagation on 3-D local permeable seabed by higher-order boundary element method

doi: 10.3969/j.issn.0253-4193.2016.01.013

1.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;School of Maritime and Civil Engineering, Zhejiang Ocean University, Zhoushan 316022, China
3.
School of Naval Architecture & Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China

Received Date: 2015-03-10
Rev Recd Date: 2015-04-30

Abstract

Abstract

Regular wave propagation on 3-D local permeable seabed is studied by higher-order boundary element method based on the linear potential flow theory. The control equation of permeable seabed is derived from the Darcy law. The boundary condition on the permeable seabed's surface is developed by the continuous conditions of normal velocity and pressure on the interface between permeable seabed and water. The boundary integral equations,which can be solved to obtain the diffraction potentials of permeable seabed,are established by the adoption of wave Green function based on the theory of wave diffraction. Then,when wave pass through the permeable seabed,the diffraction potentials of free surface and the variation of wave amplitude can be calculated after solving the boundary integral equations by higher-order boundary element method. The validity and effectiveness of the present frequency domain method is verified by the results comparison with time domain method,in that case the wave diffractions on cylindrical hump seabed are considered. The characteristic of wave propagation on 3-D local rectangular permeable seabed is investigated by the present numerical method,and the effects of parameters such as wave length and the porosity parameter are discussed further.
- permeable seabed,
- higher-order boundary element method,
- frequency domain,
- wave propagation

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