ENERGY DISSIPATION OF WAVE-UNIFORM CURRENT OVER A RIGID POROUS MEDIA WITH FINITE THICKNESS
No. 34 (2014), Waves
No. 34 (2014)

ENERGY DISSIPATION OF WAVE-UNIFORM CURRENT OVER A RIGID POROUS MEDIA WITH FINITE THICKNESS

Waves
https://doi.org/10.9753/icce.v34.waves.19
Published 2014-10-26
Jing-Hua Lin
Tainan Hydraulics Laboratory,International Wave Dynamics Research Center (IWDRC), National Cheng-Kung University
Hung-Chu Hsu
Tainan Hydraulics Laboratory,International Wave Dynamics Research Center (IWDRC), National Cheng-Kung University
Jin-Li Yu
Tainan Hydraulics Laboratory
Yang-Yih Chen
Tainan Hydraulics Laboratory
Guan-Yu Chen
Department of Oceanography, National Sun Yat-Sen University
ICCE 2014 Cover Image
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Keywords

wave-current interaction
rigid porous medium
nonlinear-unsteady porous flow model
energy dissipation.

How to Cite

Lin, J.-H., Hsu, H.-C., Yu, J.-L., Chen, Y.-Y., & Chen, G.-Y. (2014). ENERGY DISSIPATION OF WAVE-UNIFORM CURRENT OVER A RIGID POROUS MEDIA WITH FINITE THICKNESS. Coastal Engineering Proceedings, 1(34), waves.19. https://doi.org/10.9753/icce.v34.waves.19
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Abstract

The linear wave theory and the nonlinear-unsteady porous flow model are applied to analyze the energy dissipation and the bed pore water pressure induced by the interaction of wave, uniform current and porous bottom without considering the nonlinear waves and the viscosity effect inside the boundary layer. In this model, the linear, inertial and turbulent resistances are combined into a linearized resistance coefficient and the present system can be analyzed by a linear boundary value problem. The numerical result is quite agreement with the existing experimental data. It shows that the energy dissipation is reduced by the Doppler shift and the distribution of energy loss moves to the lower relative water depth region in the wave-following current. On the other hand, the bed pore water pressure in the wave-following current is always lager than that in the pure wave and the wave-opposing current.
https://doi.org/10.9753/icce.v34.waves.19
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