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http://dx.doi.org/10.17663/JWR.2017.19.4.484

A Study on Flow Characteristics according to Meandering Low Flow Channel Shape in the Compound Cross Section Typed Straight Channel  

Kim, Seonghwan (Department of Water Resources, Dongbu Engineering Co., Ltd.)
Choi, Gyewoon (Dept. of Civil and Environmental Eng., Incheon National University)
Publication Information
Journal of Wetlands Research / v.19, no.4, 2017 , pp. 484-490 More about this Journal
Abstract
In order to examine flow characteristics according to the shape of the meandering low flow channel in the compound cross section typed straight channel, we assumed the representative channel type in Korea and confirmed the validity of the 3D numerical simulation by carrying out the hydraulic model. Based on this study, numerical simulations were also conducted on other types of river channel. As a result of the numerical model test (using the velocity value measured by the water depth observation from the hydraulic model test), it was confirmed that the numerical simulation results are in good agreement with the numerical simulation results. As a result of analyzing the flow field according to the changes in the shape of the low flow channel, it was confirmed that the secondary flow examined in the previous studies occurred. Also, it was confirmed that the maximum flow velocity point moves according to the expansion cross sectional area of flow in high flow plain. Ultimately, it is thought that it is necessary to understand the position of the water impingement (which is an important factor in river design) and the extent of the impact because the change of the channel width affects the flow.
Keywords
Meandering channel; Water impingement; Compound cross section; Hydraulic experiment; Three-dimensional numerical simulation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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