Discussion of “ Separation Zone at Open‐Channel Junctions ” by James L. Best and Ian Reid (November, 1984)

1987 ◽  
Vol 113 (4) ◽  
pp. 539-543 ◽  
Author(s):  
Willi H. Hager
Keyword(s):  
Open Channel ◽  
Separation Zone

scholarly journals Flow-field Near Forty-Five Degree Dividing Open Channel

2019 ◽  
Vol 8 (3) ◽  
pp. 2768-2773
Keyword(s):  
Turbulent Flows ◽  
Open Channel ◽  
Separation Zone ◽  
Irrigation System ◽  
Effective Length ◽  
Water Diversion ◽  
Engineering System ◽  
Main River ◽  
Water Conveyance ◽  
Fluent Software

Dividing flows are most common in open channel flow in hydraulic engineering system. Turbulent flows are most common through lateral intakes adjoining rivers and canals. Lateral intakes are used for the distribution of water for irrigation system, power plant, public supply etc. Sedimentation remains the most prominent problem in and around the intake structures in water diversion engineering. Sediment entering the water conveyance system leads to reducing the effective length of the waterway and also the closure of entrances of intake structures. Diversion works or intake works are structures provided to draw in water from the main river or channel into conveyance systems for meeting different uses such a irrigation, drinking water requirements etc. In the present study, experimental and numerical modelling study has been made to model an intake at 450 and velocity is measured experimentally. These velocities are then compared with the velocity obtained using the FLUENT software in the main and branch channel along with the junction point. The study shows good agreement between the numerical simulation and experimental data. And found the variation in separation zone at different discharge ratio and compare with the separation zone which is found by the previous study around 900 water intakes

Separation Zone at Open‐Channel Junctions

1984 ◽  
Vol 110 (11) ◽  
pp. 1588-1594 ◽  
Author(s):  
James L. Best ◽  
Ian Reid
Keyword(s):  
Open Channel ◽  
Separation Zone

scholarly journals Optimal Strategy to Tackle a 2D Numerical Analysis of Non-Uniform Flow over Artificial Dune Regions: A Comparison with Bibliography Experimental Results

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2331
Author(s):  
Jungkyu Ahn ◽  
Jaelyong Lee ◽  
Sung Won Park
Keyword(s):  
Open Channel ◽  
Roughness Length ◽  
Separation Zone ◽  
Flow Simulation ◽  
Turbulence Models ◽  
Navier Stokes ◽  
Two Dimensional ◽  
Sst Model ◽  
Bed Roughness ◽  
Channel Bottom

Flow simulation over a dune requires the proper input of roughness coefficients. This study analyzed a numerical simulation of open-channel turbulent flow over two-dimensional fixed dunes to reveal the effect of roughness on the dune bottom, and to determine the optimized combination of the turbulence scheme and the roughness height formula. The most appropriate roughness values and turbulence models were applied using Reynolds-averaged Navier–Stokes models. Seven methods were chosen to estimate the bed roughness properties at the inlet boundary section. The results of all cases calculated with the OpenFOAM toolbox were compared with laboratory experimental data for model validation. The performances of all bed roughness variations were evaluated according to the stream-wise and depth-wise directions with nondimensional values. Consequently, it was revealed that the combination of bottom roughness length scale at the inlet boundary and the k-ω shear-stress transport (SST) model was the most suitable for the flow separation zone and turbulent properties near the channel bottom.

How Different Cross-Sectional Shapes Influence the Separation Zone of an Open-Channel Confluence

2017 ◽  
Vol 143 (9) ◽  
pp. 04017036 ◽  
Author(s):  
Laurent Schindfessel ◽  
Stéphan Creëlle ◽  
Tom De Mulder
Keyword(s):  
Open Channel ◽  
Separation Zone ◽  
Cross Sectional ◽  
Channel Confluence

Open-channel-block induced by the neurotransmitter glycine in homomeric alpha1-GlyR and heteromeric alpha1/beta1- GlyR

2008 ◽  
Vol 35 (S 01) ◽  
Author(s):  
Y.P Song ◽  
F Schlesinger ◽  
S Petri ◽  
R Dengler ◽  
K Krampfl
Keyword(s):  
Open Channel ◽  
Channel Block ◽  
Open Channel Block
Sign in / Sign up

Export Citation Format

Share Document