Using nanomaterial to minimize the local scour downstream of sluice gate

Ibrahim, Mohammad; Helmy, A Yasser; Alafrawi, M.A.; El-Hazek, Alaa Nabil

doi:10.1016/j.aej.2021.08.035

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…There are many experimental formulas for local scour due to hydraulic jump in stilling basins, e.g. NOVAK [1961], BAGHDADI [1997], DARGAHI [2003], AYTAC and GUNAL [2008]; ABDELHALEEM [2016; 2017]. AWAD et al [2018] investigated Minimising Scour of Contraction Stepped Spillways.…”

Section: Introductionmentioning

confidence: 99%

Journal of Water and Land Development

Nasralla

2021

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A study of scour downstream of free hydraulic jump in stilling basin of stepped spillways was carried out. This paper employed an experimental study to investigate the stepped spillway with the movable bed material of D 50 = 3.1 mm. The effect of the contraction ratio of the stepped spillway was highlighted. Different downstream divergent angle was studied to minimise the scour depth, the results showed that the relative scour depth was reduced by 23% for divergent angle is equal to 170°, different shapes of buffer in stilling basin were also studied to reduce the scour depth where the considered buffer decrease the relative scour depth up to 84%. This study was simulated by Flow 3D program to analyse the scour hole formed using velocity vectors at the bed. The simulated results well agreed with the measured data.

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Section: Introductionmentioning

confidence: 99%

Journal of Water and Land Development

Nasralla

2021

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Experimental Investigation on the Effectiveness of Nanosilica for Reducing Local Scour Around Cylindrical Bridge Piers

Dheyab,

Günal

2023

Arab J Sci Eng

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An experimental investigation for the determination of the optimum ratio of nano clay for reducing local scour around a cylindrical bridge pier

Dheyab,

Günal

2024

Water Supply

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Local scour is one of the main causes of the bridge collapse. It occurs when the flow erodes the sediments surrounding the bridge's piers. This experimental study aims to find an innovative approach for armoring the bed using nano clay to mitigate the erodibility of non-uniform sand beds. Additionally, the study investigates the nano clay-sand bed under various hydraulic conditions, with different pier diameters to determine the optimal nano clay ratio for minimizing local scour around a cylindrical bridge pier. This study indicates that the nano clay could be used effectively to reduce the local scour depth, with an optimum ratio of 0.25% when the flow shallowness is less than 1.4 and an optimum ratio of 0.5% for the flow shallowness between 1.4 and 2. Notably, a significant reduction of up to 68% in local scour depth is observed out of all experiments. Furthermore, the study demonstrates the influence of nano clay on other factors related to local scour depth. It presents a predictive equation that can be used to estimate the depth of local scour in a bed composed of nano clay and non-uniform sand. This equation is derived from the obtained data from this experimental investigation.

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Using nanomaterial to minimize the local scour downstream of sluice gate

Cited by 4 publications

References 21 publications

Journal of Water and Land Development

Journal of Water and Land Development

Experimental Investigation on the Effectiveness of Nanosilica for Reducing Local Scour Around Cylindrical Bridge Piers

An experimental investigation for the determination of the optimum ratio of nano clay for reducing local scour around a cylindrical bridge pier

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