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RESEARCH PRODUCT
Experimental study and numerical simulation of inclined rectangular weirs
Mohammad BijankhanVito Ferrosubject
0208 environmental biotechnology02 engineering and technology01 natural sciencesInclined rectangular weir010309 optics0103 physical sciencesFlow capacityOpenFOAMSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliUpstream (networking)Civil and Structural EngineeringWater Science and TechnologyComputer simulationtechnology industry and agricultureMechanicsmusculoskeletal systemequipment and suppliesAgricultural and Biological Sciences (miscellaneous)eye diseases020801 environmental engineeringWater levelPivot weirFlow capacitysense organsBuckingham analysiGeologydescription
Inclined rectangular weirs, also named pivot weirs, are used both to adjust the upstream water level and to increase the flow capacity compared with that of normal rectangular weirs. However, the experimental studies available in the literature present contradictory conclusions for the inclined weir discharge capacity. In this paper, new experimental runs and numerical simulations were performed to investigate the effect of the rectangular weir inclination angle on the stage-discharge formula. The experiments were carried out using inclination angles ranging from 30° to 90°. Buckingham's theorem of dimensional analysis was used to obtain an equation for the flow magnification ratio (the discharge through the pivot weir divided by the corresponding discharge over the vertical weir) as a function of theweir inclination angle. The experimental observations revealed that the flow magnification ratio increases with the inclination angle to a maximum of 1.082 for 30° of inclination. Bidimensional (2D) numerical analysis using theOpenFOAMcomputational fluid dynamic toolbox was also used. The flow magnification ratios obtained numerically confirmed those obtained experimentally.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-07-01 |