This paper aims at studying the role of difference in bed elevations between the tributary and main canals (z T) in 90 confluence under different hydrologic/hydraulic conditions. To do this, 3D finitevolume model is used. Four z T / hd values in the range [0.0, 0.5] (where hd stands for the flow depth in the main canal at the confluence) and three values of the discharge ratio DR =QMR/Qtot ={0.250, 0.583, 0.750} are considered. It is found that the: 1) increase in z T attenuates 3D flow at the confluence and enhances 3D flow in the post-confluence canal, 2) enhanced 3D flow affects the existence, size and position of the recirculation zone (RZ), 3) size of the RZ reduces as z T increases, 4) maximal shear is attained in the upper layers when z T >0 and 5) zone of τ0, max reduces and moves to the downstream junction corner as z T increases.
Извор:
River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics, 2012, 2, 1153-1160
TY - CONF
AU - Đorđević, Dejana
PY - 2012
UR - http://grafar.grf.bg.ac.rs/handle/123456789/449
AB - This paper aims at studying the role of difference in bed elevations between the tributary and main canals (z T) in 90 confluence under different hydrologic/hydraulic conditions. To do this, 3D finitevolume model is used. Four z T / hd values in the range [0.0, 0.5] (where hd stands for the flow depth in the main canal at the confluence) and three values of the discharge ratio DR =QMR/Qtot ={0.250, 0.583, 0.750} are considered. It is found that the: 1) increase in z T attenuates 3D flow at the confluence and enhances 3D flow in the post-confluence canal, 2) enhanced 3D flow affects the existence, size and position of the recirculation zone (RZ), 3) size of the RZ reduces as z T increases, 4) maximal shear is attained in the upper layers when z T >0 and 5) zone of τ0, max reduces and moves to the downstream junction corner as z T increases.
C3 - River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics
T1 - Role of bed elevation discordance at 90? straight-channel confluences
EP - 1160
SP - 1153
VL - 2
ER -
@conference{
author = "Đorđević, Dejana",
year = "2012",
url = "http://grafar.grf.bg.ac.rs/handle/123456789/449",
abstract = "This paper aims at studying the role of difference in bed elevations between the tributary and main canals (z T) in 90 confluence under different hydrologic/hydraulic conditions. To do this, 3D finitevolume model is used. Four z T / hd values in the range [0.0, 0.5] (where hd stands for the flow depth in the main canal at the confluence) and three values of the discharge ratio DR =QMR/Qtot ={0.250, 0.583, 0.750} are considered. It is found that the: 1) increase in z T attenuates 3D flow at the confluence and enhances 3D flow in the post-confluence canal, 2) enhanced 3D flow affects the existence, size and position of the recirculation zone (RZ), 3) size of the RZ reduces as z T increases, 4) maximal shear is attained in the upper layers when z T >0 and 5) zone of τ0, max reduces and moves to the downstream junction corner as z T increases.",
journal = "River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics",
title = "Role of bed elevation discordance at 90? straight-channel confluences",
pages = "1160-1153",
volume = "2"
}
Đorđević D. Role of bed elevation discordance at 90? straight-channel confluences. River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics. 2012;2:1153-1160
Đorđević, D. (2012). Role of bed elevation discordance at 90? straight-channel confluences.
River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics, 2, 1153-1160.
Đorđević Dejana, "Role of bed elevation discordance at 90? straight-channel confluences" 2 (2012):1153-1160
