Determination of flow characteristics over sharp-crested triangular plan form weirs using numerical simulation

Daneshfaraz, Rasoul; Norouzi, Reza; Patrick Abraham, John; Ebadzadeh, Parisa; Akhondi, Behnaz; Abar, Maryam

doi:10.1080/23570008.2023.2236384

Water Science

2023

DOI: 10.1080/23570008.2023.2236384

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Determination of flow characteristics over sharp-crested triangular plan form weirs using numerical simulation

Rasoul Daneshfaraz,

Reza Norouzi,

John Patrick Abraham

et al.

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2024

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Cited by 3 publications

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Experimental and numerical investigations of the mixing processes of pollutants at notched weirs in rivers

Jung,

Seo

2024

Journal of Hydrology

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Experimental and numerical investigations of the mixing processes of pollutants at notched weirs in rivers

Jung,

Seo

2024

Journal of Hydrology

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The effect of gabion steps on the hydraulic jump characteristics downstream of stepped spillways

Daneshfaraz,

Sadeghi,

Ghaderi

et al. 2024

Water Science

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Energy Dissipation Assessment in Flow Downstream of Rectangular Sharp-Crested Weirs

Sohrabzadeh Anzani,

Kantoush,

Mahdian Khalili

et al. 2024

Water

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Sharp-crested weirs are commonly used in hydraulic engineering for flow measurement and control. Despite extensive research on sharp-crested weirs, particularly regarding their discharge coefficients, more information is needed via research on their energy dissipation downstream. This study conducted experimental tests to assess the influence of contraction ratio (b/B) of rectangular sharp-crested weirs (RSCWs) on energy dissipation downstream under free flow conditions. Five RSCWs with different b/B equals 6/24, 7/24, 8/24, 9/24, and 10/24 were used. The results showed a consistent decrease in relative energy dissipation (Δ𝐸𝑟) with an increase in the head over the weir. Furthermore, as the discharge per unit width (q) increased, the relative energy dissipation (Δ𝐸𝑟) decreased, indicating more efficient discharge over the weir. A higher b/B further reduces Δ𝐸𝑟, suggesting that wider weirs are more effective in minimizing energy losses. The maximum relative residual energy (E1/E0) and relative energy dissipation (Δ𝐸𝑟) occurred at b/B = 10/24 and 6/24, with values of 0.825 and 0.613, respectively. Additionally, the maximum discharge coefficient (Cd) of RSCWs is found at b/B = 6/24, with an average value of 0.623. The results support the accuracy of the proposed equation with R2 = 0.988, RMSE = 0.0083, and MAPE = 1.43%.

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Determination of flow characteristics over sharp-crested triangular plan form weirs using numerical simulation

Cited by 3 publications

References 24 publications

Experimental and numerical investigations of the mixing processes of pollutants at notched weirs in rivers

Experimental and numerical investigations of the mixing processes of pollutants at notched weirs in rivers

The effect of gabion steps on the hydraulic jump characteristics downstream of stepped spillways

Energy Dissipation Assessment in Flow Downstream of Rectangular Sharp-Crested Weirs

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