MEAN AND TURBULENCE STRUTURES OF OPEN-CHANNEL FLOWS WITH SUBMERGED VEGETATION
In this study, the mean flow and turbulent structures of the open-channel flows with the submerged vegetation was explored. For this, laboratory flume experiments are conducted with model vegetation without foliage. Wooden dowel is used for rigid vegetation, and polyethylene film is used for flexible vegetation. Other properties of model vegetation are made the same. Mean and fluctuation velocities are measured using the laser Doppler anemometer. From the measured data, the vertical profiles of mean velocity, turbulent intensity, Reynolds shear stress are obtained. The general profiles for mean velocity and turbulent intensity is suggested, and the profiles of Reynolds shear stress were investigated. The impact of stem flexibility was also investigated. It was shown that mean velocity and Reynolds shear stress can hardly distinguished from that with rigid vegetation. However,turbulent intensity profiles were affected by stem flexibility.
Open-channel flow vegetation flezibility turbulence
Wonjun Yang Sung Uk Choi
School of Civil and Environmental Engineering, Yonsei University, 120-749 Seoul, Korea
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
429-434
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）