The influences of Doppler shift on the wave dissipation and soil responses over the porous medium

Jing-Hua Lin, Hung Chu Hsu, Yang Yih Chen

研究成果: Article

摘要

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.

原文English
頁(從 - 到)127-139
頁數13
期刊Coastal Engineering Journal
60
發行號2
DOIs
出版狀態Published - 2018 一月 1

指紋

Doppler Shift
Doppler effect
Porous Media
Porous materials
Soil
Dissipation
Energy dissipation
Soils
Energy Dissipation
Flow velocity
Damping
Induced currents
Vertical
Phase shift
Kinematics
Phase Shift
Wavelength
Influence
Adjustment
Directly proportional

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Ocean Engineering

引用此文

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abstract = "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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The influences of Doppler shift on the wave dissipation and soil responses over the porous medium. / Lin, Jing-Hua; Hsu, Hung Chu; Chen, Yang Yih.

於: Coastal Engineering Journal, 卷 60, 編號 2, 01.01.2018, p. 127-139.

研究成果: Article

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