An experimental study of mean and turbulent flow in a 180 degree sharp open channel bend: Secondary flow and bed shear stress

M Vaghefi, M Akbari, AR Fiouz - KSCE Journal of Civil Engineering, 2016 - Springer
High flow velocity near the free surface in rivers is due to the presence of shear stress near
the bed and its absence on the free surface. This phenomenon results in unsteadiness of the …

[PDF][PDF] Experimental investigation on streamlines in a 180º sharp bend

M Akbari, M Vaghefi - Acta Scientiarum. Technology, 2017 - redalyc.org
One of the most important concerns of hydraulics engineers is predicting erosion at the outer
banks of rivers by studying the flow pattern along the bend. Not only are the streamlines in …

The effect of collar width ratio on the flow pattern around an oblong pier in a bend

D Dehghan, M Vaghefi, M Ghodsian - Water Supply, 2021 - iwaponline.com
In this paper, the effect of collar width ratio on the flow pattern around an oblong pier in a
180-degree channel bend was experimentally studied. This channel has a rectangular cross …

Numerical Investigation of Bed Shear Stress and Roughness Coefficient Distribution in a Sharp Open Channel Bend

P Hu, M Yu - Journal of Applied Fluid Mechanics, 2023 - jafmonline.net
The helical flow leads to the redistribution of the bed shear stress and roughness coefficient
in open-channel bends, influencing the transport of sediment and riverbed evolution …

A procedure for setting up a 180-degree sharp bend flume including construction and examinations with hydraulic structures

M Vaghefi, M Akbari - Scientia Iranica, 2019 - scientiairanica.sharif.edu
A laboratory flume in the hydraulics laboratory is necessary in order to investigate and
model different hydraulic and hydrodynamic phenomena which govern the river. Hence, this …

[PDF][PDF] 正弦派生曲线弯道水流结构特征实验研究

曹玉芬, 高术仙, 白玉川 - 水力发电学报, 2020 - slfdxb.cn
探究窄深型弯曲河段三维水流结构, 使用声学多普勒流速仪(ADV) 对正弦派生弯道水槽中40
个断面12160 个测点三维水流数据进行加密测量研究, 研究结果表明: 弯曲岸壁形态改变了水流 …

Flow Dynamics in a River Bend in Response to Hydrological Variations—The Gomti River (India) Case Study

A Das, SK Biswal - Water Resources, 2024 - Springer
River bends in actively developing lowland rivers exhibit complex flow characteristics owing
to the mutual impacts of secondary current, large water-surface fluctuations, and flow …

[PDF][PDF] Experimental investigation of the three-dimensional flow velocity components in a 180 degree sharp bend

M Vaghefi, M Akbari, AR Fiouz - World Applied Programming, 2015 - Citeseer
River bend routes are one of the considerable areas in flow pattern investigation. The flow in
river bends is affected by centrifugal force and pressure gradient. Thus, studying 3D flow …

Comparison of flow pattern in a 60° sharp bend by using Fluent software and artificial neural network, support Vector Machine Methods

S Ajeel, A Gholami, H Bonakdari… - … (mesop. environ. j) …, 2016 - mej.uobabylon.edu.iq
This paper presents an experimental and numerical study of the flow patterns in a strongly-
curved 60o open channel bend. Corresponding numerical model is based on the Fluent …

Study of secondary flow and sediment transport in a laboratory-scale model of a meandering river

TD HO, QY NGUYEN, XL LUU - Advanced Experimental Mechanics, 2017 - jstage.jst.go.jp
Secondary currents strongly influence shapes of meandering rivers and cause sediment
deposition on the inner banks and erosion on the outer banks. We report the curved channel …