首页|Wave Attenuation and Turbulence Driven by Submerged Vegetation Under Current-Wave Flow

Wave Attenuation and Turbulence Driven by Submerged Vegetation Under Current-Wave Flow

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A set of laboratory experiments are carried out to investigate the effect of following/opposing currents on wave atten-uation.Rigid vegetation canopies with aligned and staggered configurations were tested under the condition of various regular wave heights and current velocities,with the constant water depth being 0.60 m to create the desired submerged scenarios.Results show that the vegetation-induced wave dissipation is enhanced with the increasing incident wave height.A larger velocity magnititude leads to a greater wave height attenuation for both following and opposing current conditions.Moreover,there is a strong positive linear correlation between the damping coefficient β and the relative wave height H0/h,especially for pure wave conditions.For the velocity profile,the distributions of Umin and Umax show different patterns under combined wave and current.The time-averaged turbulent kinetic energy(TKE)vary little under pure wave and Uc=±0.05 m/s conditions.With the increase of flow velocity amplitude,the time-averaged TKE shows a particularly pronounced increase trend at the top of the canopy.The vegetation drag coefficients are obtained by a calibration approach.The empirical relations of drag coefficient with Reynolds and Keulegane-Carpenter numbers are proposed to further understand the wave-current-vegetation interaction mechanism.

wave attenuationrigid vegetationfollowing and opposing currentsturbulent kinetic energy

HUANG Yu-ming、Ding Lei、WANG Yi-fei、CHEN Ben、YANG Xiao-yu、DOU Xi-ping

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School of Water Resources and Hydropower Engineering,Wuhan University,Wuhan,430072,China

Key Laboratory of Port,Waterway and Sedimentation Engineering of MOT,Nanjing Hydraulic Research Institute,Nanjing 210029,China

国家重点研发计划国家自然科学基金国家自然科学基金Nanjing Hydraulic Research Institute Special Fund for Basic Scientific Research of Central Public Research InstitutesNanjing Hydraulic Research Institute Special Fund for Basic Scientific Research of Central Public Research InstitutesCRSRI Open Research ProgramPost-Three Gorges Sediment Research Project of MWR(Project Ⅲ)

2023YFC3208501U234022551979172Y223002Y220013CKWV20221007/KY

2024

10.1007/s13344-024-0047-5

中国海洋工程(英文版)
中国海洋学会

中国海洋工程(英文版)

CSTPCDEI
影响因子：0.338
ISSN：0890-5487
年,卷(期)：2024.38(4)
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