Advances in Research on Bragg Resonance of Ocean Surface Waves by Sandbars and Artificial Sandbars

LIU Huan-wen

doi:10.3879/j.issn.1000-0887.2016.05.002

Volume 37 Issue 5

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LIU Huan-wen. Advances in Research on Bragg Resonance of Ocean Surface Waves by Sandbars and Artificial Sandbars[J]. Applied Mathematics and Mechanics, 2016, 37(5): 459-471. doi: 10.3879/j.issn.1000-0887.2016.05.002

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Advances in Research on Bragg Resonance of Ocean Surface Waves by Sandbars and Artificial Sandbars

doi: 10.3879/j.issn.1000-0887.2016.05.002

LIU Huan-wen

School of Naval Architecture and Ocean Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, P.R.China

Funds: The National Natural Science Foundation of China(11572092; 51369008)

Received Date: 2016-01-12
Rev Recd Date: 2016-01-30
Publish Date: 2016-05-15

Abstract

Abstract

On natural beaches nearly periodic shore-parallel sand ripples and sandbars can be often found in bays or on open coasts. When surface waves coming from the ocean propagate over patches of sand ripples and sandbars, once the Bragg condition is met, that is, the wavelength of surface waves is twice of the sandbar spacings, the Bragg resonant reflection may occur to cause a large portion of the incident wave energy to be reflected back to the ocean. Inspired by the Bragg resonant reflection phenomenon of natural sand ripples and sandbars, some pioneering scientists proposed the so-called Bragg submerged breakwater consisting of a series of small-size, low-height, shore-parallel artificial bars placed just outside the surf zone to shelter the coast and near-shore facilities from the attack of storm waves. A brief summary of the advances in research on Bragg resonance between ocean surface waves and natural sandbars as well as Bragg submerged breakwaters since 1980s was presented.
- sinusoidal sandbar,
- artificial sandbar,
- surface wave,
- reflection coefficient,
- Bragg resonance

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References

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