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Structure of Turbulent Flow in a Meander Gravel Bed Channel
Various types of bed materials are present in rivers or canals, and they have important effects on hydrodynamic characteristics such as velocity distribution and turbulence characteristics. Study of the flow behavior in gravel bed channels is limited until the flow structures are described and their origin explained. In the meandering river consisting of gravel as bed material, eddies can be seen at the surface due to which flow turbulence is not random. The experimentations were performed in a prismatic rectangular concrete meander channel having a slope of 0.001 and sinuosity of 1.06 and this channel bed is arranged with non-uniform gravel with D50 as 12 mm to study the turbulent flow characteristics such as time-averaged velocity and turbulent intensity along longitudinal and vertical directions at two different discharges. The experimental data were collected by a 3D Acoustic Doppler Velocimeter. In this investigation, longitudinal velocity decreases in the downstream direction near the bed surface but increases along the free surface and vertical velocity reduces in the direction of the stream. Analysis and comparison of turbulent flow properties in a gravel bed meander channel at two different discharges and different sections are studied in this chapter. It will give a better impact on the field of hydraulics and provide a comprehensive idea for studying some important flow characteristics in a more advanced manner for different conditions.
Structure of Turbulent Flow in a Meander Gravel Bed Channel
Various types of bed materials are present in rivers or canals, and they have important effects on hydrodynamic characteristics such as velocity distribution and turbulence characteristics. Study of the flow behavior in gravel bed channels is limited until the flow structures are described and their origin explained. In the meandering river consisting of gravel as bed material, eddies can be seen at the surface due to which flow turbulence is not random. The experimentations were performed in a prismatic rectangular concrete meander channel having a slope of 0.001 and sinuosity of 1.06 and this channel bed is arranged with non-uniform gravel with D50 as 12 mm to study the turbulent flow characteristics such as time-averaged velocity and turbulent intensity along longitudinal and vertical directions at two different discharges. The experimental data were collected by a 3D Acoustic Doppler Velocimeter. In this investigation, longitudinal velocity decreases in the downstream direction near the bed surface but increases along the free surface and vertical velocity reduces in the direction of the stream. Analysis and comparison of turbulent flow properties in a gravel bed meander channel at two different discharges and different sections are studied in this chapter. It will give a better impact on the field of hydraulics and provide a comprehensive idea for studying some important flow characteristics in a more advanced manner for different conditions.
Structure of Turbulent Flow in a Meander Gravel Bed Channel
Lecture Notes in Civil Engineering
Dutta, Subashisa (editor) / Chembolu, Vinay (editor) / Kumar, Abhimanyu (author) / Kumar, Pritam (author) / Sharma, Anurag (author)
International Conference on River Corridor Research and Management ; 2022
2023-08-18
10 pages
Article/Chapter (Book)
Electronic Resource
English
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