Abstract
This paper presents an experimental study of a 90° channel junction with equal and opposing flow in the upstream main channel. The aim of the study is to predict the size of the recirculation zones in the downstream branch channel that are formed as the flow makes a 90° turn after colliding and the associated energy loss. Detailed three-dimensional velocity profiles are measured with an acoustic Doppler velocimeter in the upstream main channel and downstream branch channel for different width ratios of the main and branch channels and inlet Froude numbers. The velocity profiles are depth-averaged to determine the maximum width of the recirculation zones in the branch channel. The velocity and flow depth distributions in the main and branch channels near and within junctions are dependent on inlet Froude number and channel width ratio. An analytical model based on mass, momentum and energy principles is developed and used to predict the maximum width of the recirculation zones. The maximum relative error in the predicted maximum width of the separation zone is less than 6·5%.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings of the Institution of Civil Engineers - Water Management
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
