Shear stress is a key parameter that plays an important role in sediment transport mechanisms; therefore, understanding shear stress distribution in rivers, and especially in river bends, is necessary to predict erosion, deposition mechanisms and lateral channel migration. The aim of this study is to analyze the shear stress distribution near a river bed at 90-degree channel bend using a depth-average method based on experimental measurement data. ; Bed shear stress distribution is calculated using the depth-averaged method based on velocity components data has been collected from a 3D-ADV device (three-dimensional acoustic doppler velocity) at different locations of a meandering channel. Laboratory experiments have been made at the hydraulic laboratory of the RCRFIDF (Research Centerfor River Flow Impingement and Debris Flow), Gangneung-Wonju National University, South Korea to provide data for simulating the incipient motion of the riverbed materials and then predicting the river morphological changes in the curved rivers. ; The calculated results show that the maximum value of shear stress distribution near the riverbed in the different cross sections of the surveyed channel occurs in a 70-degree cross section and occurs near the outer bank. From the beginning of a 40-degree curved channel section, the maximum value of the shear stress occurs near the outer bank at the end of the channel.
Zielona Góra: Uniwersytet Zielonogórski
IJAME, volume 24, number 1 (2019)
Biblioteka Uniwersytetu Zielonogórskiego
Jul 6, 2023
Mar 1, 2023
63
https://zbc.uz.zgora.pl/publication/78253
Edition name | Date |
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Investigation of shear stress distribution in a 90 degree channel bend | Jul 6, 2023 |
Sudha, T. Umadevi, Chatla Dhange, Mallinath Manna, Santanu Misra, J.C. Jurczak, Paweł - red.
Safi, Brahim Aboutaleb, Djamila Haider, Soumya Jurczak, Paweł - red.
Rajagopal, K. Veena, P.H. Pravin, V.K. Jurczak, Paweł - red.
Bellayoune, Assia Messast, Salah Boulon, Marc Kuczyński, Tadeusz - red.
Sharma, Bhupendra Kumar Tailor, Vikas Goyal, Mahesh Chandra Jurczak, Paweł - red.
Sayfidinov, Okhunjon Bognar, Gabriella Jurczak, Paweł - red.
Łukaszewski, Krzysztof Buchwald, Tatiana Wichniarek, Radosław Jurczak, Paweł - red.
Greinert, Henryk Greinert, Andrzej Drab, Michał Greinert, Andrzej - red. Kołodziejczyk, Urszula - red.