Numerical investigation of the optimum angle for open channel junction Date: 15/12/2023 | Views: 425

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A research was published by the lecturer in the Department of Engineering and Construction Technologies (Nidaa Ali Shubat) entitled (Numerical investigation of the optimal angle at the intersection of open channels). Publication link (
In Civil engineering journal Scopus Q1
Search summary:
Many natural and artificial streams, including those designated for irrigation canals, wastewater treatment facilities, and conveyance structures for fish movement, have confluences in open channels. The flow dynamics at and around the intersection are complex; In particular, immediately below the junction, the flow creates a dividing zone on the inner wall along with secondary recirculation patterns. The structure of this complex flow depends on several factors, including flow rates in both channels, meeting angle, channel geometry, including longitudinal slope and bed repulsion, boundary roughness, and turbulence intensity. . It also has a significant impact on bed erosion, bank erosion, etc. The aim of the current work is to calculate the velocity profile and dimensions of the separation zone for four angles (30°, 45°, 60°, and 75°) through the simulation process. And the best angle using a 3D model. This work presents a detailed implementation of the numerical solution (Finite Volume) via Flow 3D software. Results for two flow discharge ratios, q*=0.250 and q*=0.750, are shown; The numerical model and experimental results agreed well. The results are consistent with previous research and demonstrate how the main channel flow pattern is affected by changes in the channel crossing angle, as well as how larger separation zones are produced in the main channel when the flow discharge ratio q* (main channel flow divided by the total flow) is smaller. The analysis revealed that the smallest diameter of the separation zone would be at a crossing angle of 75 degrees.