Bragg Resonance around the Coast of Hardwall

Authors

  • Viska Noviantri Bina Nusantara University
  • Ro’fah Nur Rachmawati Bina Nusantara University

DOI:

https://doi.org/10.21512/comtech.v7i4.2547

Keywords:

basic sinusoidal, Bragg resonance, the hard-wall

Abstract

Basically, when waves pass an uneven basis, then this wave will be split into transmission and reflection waves. First of all, it will be shown that a sinusoidal seabed can lead to the phenomenon of Bragg resonance. Bragg resonance occurs when the wave-length comes at twice the wave-length of a sinusoidal basis. The method used to obtain approximation solution is a multi-scale asymptotic expansion method. A research on the effect of Bragg resonance on sinusoidal basis had been studied. Sinusoidal basis can reduce the amplitude of the incoming wave so that the amplitude of the wave transmission is quite small. In these researcher, the coast is assumed ideal and can absorb all the energy of the wave transmission. If the beach can reflect waves, this indicates that the existence of sinusoidal basis is more harmful to the coast. This mechanism relies on the distance between the base sinusoidal and beaches. The present research will examined the influence of the base, when there was a beach of hard-wall on the right, which was perfectly capable of reflecting waves. Having regard to the phase difference, from super positioned waves when they hit the beach, so it can determine the safert and the most dangerous distance.
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Author Biographies

Viska Noviantri, Bina Nusantara University

Mathematics and Statistics Department, School of Computer Science

Ro’fah Nur Rachmawati, Bina Nusantara University

Mathematics and Statistics Department, School of Computer Science

References

Heathershaw, A. D. (1982). Seabed-wave resonance and sandbar growth. Nature, 296, 343-345. doi: 10.1038/296343a0

Mei, C. C. (2004). Multiple Scattering by an Extended Region of Inhomogeneities. Retrieved from http://web.mit.edu/1.138j/www/material/chap-5.pdf

Noviantri, V. & Pudjaprasetya, S. R. (2010). The Relevance of Wavy Beds as Shoreline Protection. Proceedings of the 13th Asian Congress of Fluid Mechanics, 489-492.

Pudjaprasetya, S. R. & Chendra, H. D. (2010). An Optimal Dimension of Submerged Parallel Bars as a Wave Reflector. The Bulletin of the Malaysian Mathematical Society, 32(1), 55-62.

Wiryanto, L. H. (2010). Unsteady Waves Generated by Flow over a Porous Layer. IAENG International Journal of Applied Mathematics, 40(4).

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Published

2016-12-31

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Articles
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