著者
土屋 十圀 池田 駿介
出版者
Japan Society of Civil Engineers
雑誌
水工学論文集 (ISSN:09167374)
巻号頁・発行日
vol.42, pp.403-408, 1998-02-20 (Released:2010-08-25)
参考文献数
11
被引用文献数
1 1

The present paper deals with hydraulics in compound open channels with vegetation, the purpose of which is the application of the experimental results to planning and design of actual rivers. The experimental study was performed by measuring the resistance to flow in channel with artificial reeds and lateral velocity distribution at various design discharges. The laboratory tests indicate that the resistance coefficient is increased considerably (by 53%) even if the vegetation locates only at low banks. As an experimental technique, it was found that fine nylon-filament was the best to simulate flexible vegetation.
著者
池田 駿介 粕谷 泉 河村 一弘
出版者
日本流体力学会
雑誌
日本流体力学会年会講演論文集 = Proceedings, ... meeting of Japan Society of Fluid Mechanics (ISSN:13428004)
巻号頁・発行日
vol.2001, pp.61-62, 2001-07-01

In the curved compound channels, there are secondary flows induced by centrifugal forces and horizontal vortices at the junction of main channel and flood plains. We conducted experiments to measure the horizontal vortices and the velocity field of flow. A quasi-three-dimensional computation using SDS-Q3D model was performed, and the results were compared with the experiments. The result shows that this model is appropriate to simulate the entire flow field except for the inner junction of the main channel and the flood plains where 3D turbulence associated with boils is predominant.