TY - JOUR
T1 - The influences of Doppler shift on the wave dissipation and soil responses over the porous medium
AU - Lin, Jing Hua
AU - Hsu, Hung Chu
AU - Chen, Yang Yih
N1 - Funding Information:
This paper was supported with the grants from the Ministry of Science and Technology–International Wave Dynamics Research Center (NSC 106-2911-I-006-301). The authors thank Mr. W. G. Qi and Prof. F. P. Gao in Institute of Mechanics-Chinese Academy of Sciences to provide the experiment data. Moreover, the authors also thank the reviewer’s comments.
Funding Information:
This paper was supported with the grants from the Ministry of Science and Technology-International Wave Dynamics Research Center (NSC 106-2911-I-006-301).
Funding Information:
This paper was supported with the grants from the Ministry of Science and Technology–International Wave Dynamics Research Center (NSC 106-2911-I-006-301).
Publisher Copyright:
© 2018 Japan Society of Civil Engineers.
PY - 2018
Y1 - 2018
N2 - The influences combined the porous seabed and the uniform current on the energy dissipation and the soil responses in the wave-current interaction over the ideal porous seabed are presented in this paper by using the 1D linear wave theory and the linearized porous flow. The relative wave damping rate can be numerically determined by using the complex dispersion relationship. The influences of Doppler shift and the thickness of porous seabed on the wave damping rate, the pore water pressure and its phase shift are discussed, respectively. In addition, the differences using numerous common porous flow model is also compared. Present results find that the energy dissipation is affected by the Doppler shift because the soil responses and the discharge velocity is changed due to the current induced the adjustment of wavenumber or the wavelength. In the case of following current, the interfacial vertical velocity is decreased with the increase of the current velocity. On the other hand, before reaching up the kinematic limit, the magnitude of interfacial vertical velocity is proportional to the flow velocity in the cases of opposing current. Respectively, clarifying the relative importance of the Doppler shift and the thickness of porous media on the energy loss and the soil responses are found that the influence of the thickness of the porous seabed on the energy dissipation has better efficiency. Relative to the thickness of the permeable seabed, the flow velocities and its direction is the important factor on calculating the soil responses.
AB - The influences combined the porous seabed and the uniform current on the energy dissipation and the soil responses in the wave-current interaction over the ideal porous seabed are presented in this paper by using the 1D linear wave theory and the linearized porous flow. The relative wave damping rate can be numerically determined by using the complex dispersion relationship. The influences of Doppler shift and the thickness of porous seabed on the wave damping rate, the pore water pressure and its phase shift are discussed, respectively. In addition, the differences using numerous common porous flow model is also compared. Present results find that the energy dissipation is affected by the Doppler shift because the soil responses and the discharge velocity is changed due to the current induced the adjustment of wavenumber or the wavelength. In the case of following current, the interfacial vertical velocity is decreased with the increase of the current velocity. On the other hand, before reaching up the kinematic limit, the magnitude of interfacial vertical velocity is proportional to the flow velocity in the cases of opposing current. Respectively, clarifying the relative importance of the Doppler shift and the thickness of porous media on the energy loss and the soil responses are found that the influence of the thickness of the porous seabed on the energy dissipation has better efficiency. Relative to the thickness of the permeable seabed, the flow velocities and its direction is the important factor on calculating the soil responses.
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U2 - 10.1080/05785634.2017.1418795
DO - 10.1080/05785634.2017.1418795
M3 - Article
AN - SCOPUS:85058159391
VL - 60
SP - 127
EP - 139
JO - Coastal Engineering in Japan
JF - Coastal Engineering in Japan
SN - 0578-5634
IS - 2
ER -