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• W4280641012 abstract "Abstract Rivers play an integral part in the sustenance of life on earth. Flooding in rivers hinders the everyday lifestyle of the people in that region. Therefore, river engineers need to understand the characteristics of rivers (both in-bank and overbank flow conditions) and mitigate flood impacts using this study. The channel’s sinuous nature causes erosion of its outer wall and silt deposition on its inner wall. These changes in the terrain make it vital to design the meandering compound channel. The floodplains act as storage for floods during high flows. Levees, both straight and meandering, can be constructed on both sides of the channel to guard the surrounding lands. For doubly meandering levee alignment, the momentum transfer between the main channel and the adjoining floodplains affects the velocity distribution across the channel cross-section. So, hydraulic engineers must investigate this complex flow phenomenon in the case of a doubly meandering compound channel. This study investigates the flow in meandering compound channels using numerical and physical modelling, both of which are important in understanding non-uniform flow and its behaviour. Flood management, sediment transport, riverbank protection, and other critical engineering problems can be solved with accurate velocity and boundary shear distribution predictions along the open channel's cross-section. As a result, a research is presented on the sharing of shear stress throughout the channel bed, as well as boundary and velocity over the cross section of the main channel and the floodplains of meandering compound channels. The authors attempt to include flow complexity by modifying measurable properties of a meandering compound channel, such as width ratio, aspect ratio, and hydraulic parameter, relative depth, all of which have a significant impact on the flow. The geometry of meandering compound channels, having straight as well as sinuous floodplain levees, is chosen for this study. Unlike the experimental models, numerical hydraulic models are remarkably economical. So, in this research, the numerical hydraulic model is adopted to determine the different flow characteristics of compound meandering channels. In this paper, a complete three-dimensional and two-phase Computational Fluid Dynamics (CFD) model of the meandering compound channels is analyzed making use of the RNG K - ɛ turbulence model as we as Volume of Fluid (VOF) methodology. A comparison study between numerical results and experimental results are represent considering the two different experimental data of compound meandering channel having the main channel meandered with sinuosity (ratio of channel length to the down valley length) of 1.37 and were flanked by straight floodplains as well as meandered flood plains having sinuosity 1.06 on both sides. By error analysis, it is observed that the numerical results agree with that of the experimental ones." @default.
• W4280641012 created "2022-05-22" @default.
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• W4280641012 date "2022-05-19" @default.
• W4280641012 modified "2023-10-15" @default.
• W4280641012 title "Validation of Computational Fluid Dynamics Approach of Lateral Velocity Profile Due to Curvature Effect on Floodplain Levee of Two-stage Meandering Channel" @default.
• W4280641012 doi "https://doi.org/10.21203/rs.3.rs-1652433/v1" @default.
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