Experimental study and numerical simulation of inclined rectangular weirs

Vito Ferro, Mohammad Bijankhan

Risultato della ricerca: Article

3 Citazioni (Scopus)

Abstract

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.
Lingua originaleEnglish
pagine (da-a)04018012-
Numero di pagine8
RivistaJOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
Volume144
Stato di pubblicazionePublished - 2018

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Weirs
Computer simulation
Water levels
Fluid dynamics
Numerical analysis
Experiments

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Agricultural and Biological Sciences (miscellaneous)
  • Water Science and Technology

Cita questo

Experimental study and numerical simulation of inclined rectangular weirs. / Ferro, Vito; Bijankhan, Mohammad.

In: JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, Vol. 144, 2018, pag. 04018012-.

Risultato della ricerca: Article

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AU - Bijankhan, Mohammad

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AB - 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.

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