Study on the higher free harmonic waves on the lee side of a submerged bar

CHEN Li-fen; NING De-zhi; TENG Bin; ZHANG Jian-qiao

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CHEN Li-fen, NING De-zhi, TENG Bin, ZHANG Jian-qiao. Study on the higher free harmonic waves on the lee side of a submerged bar[J]. Haiyang Xuebao, 2011, 33(6): 165-172.

Citation:

CHEN Li-fen, NING De-zhi, TENG Bin, ZHANG Jian-qiao. Study on the higher free harmonic waves on the lee side of a submerged bar[J]. Haiyang Xuebao, 2011, 33(6): 165-172.

CHEN Li-fen, NING De-zhi, TENG Bin, ZHANG Jian-qiao. Study on the higher free harmonic waves on the lee side of a submerged bar[J]. Haiyang Xuebao, 2011, 33(6): 165-172.

Citation:

CHEN Li-fen, NING De-zhi, TENG Bin, ZHANG Jian-qiao. Study on the higher free harmonic waves on the lee side of a submerged bar[J]. Haiyang Xuebao, 2011, 33(6): 165-172.

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Study on the higher free harmonic waves on the lee side of a submerged bar

1.
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Research Institute,Nanjing,210098,China;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
3.
Fishery Engineering Research Institute, Chinese Academy of Fishery Sciences, Beijing 100141, China

Received Date: 2010-06-22
Rev Recd Date: 2011-04-01

Abstract

Abstract

A three-dimensional fully nonlinear numerical wave tank (NWT) based on a time-domain higher-order boundary element method (HOBEM) is used. The numerical model is applied to simulating wave transformation over a submerged bar. The present model is validated by comparison with the experimental results. A two-point method is introduced to decompose higher harmonic waves on the lee side of the submerged bar. And then the evolutions of the wave amplitude of the nth free waves with incident wave characteristics and the water depth are further studied. It shows that the amplitude of fundamental waves varies linearly with the incident wave amplitudes. It also indicates that the amplitude of the second-order and third-order free waves can be represented by a quadratic and cubic function of the amplitude of incident waves, respectively. A conclusion can be obtained in which the amplitude of fundamental waves remains approximately unchanged with the incident wave periods. In contrast, the amplitude of the second-order and third-order free waves obeys a quadratic and cubic law with the incident wave periods, respectively.
- numerical wave tank,
- two-point method,
- higher harmonic free waves,
- submerged bar,
- fully nonlinear

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References(19)

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