Verification of numerical study of scour around spur dikes using experimental data

Karami, Hojat; Basser, Hossein; Ardeshir, Abdollah; Hosseini, Seyyed Hadi

doi:10.1111/wej.12019

Cited by 48 publications

(29 citation statements)

References 15 publications

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“…This type of modelling is used in enormous studies such as (An et al, 2015), (Li et al, 2016) and (Shamohamadi et al, 2016) for scour and sediment transport module which is recently added to FLOW-3D. In order to validate numerical simulation, experimental and numerical results presented by (Karami et al, 2014) are compared with 10 FLOW-3D results. …”

Section: Discussion Open Accessmentioning

confidence: 99%

“…This paper is based on Karami et al (2014) work and their work is utilized to find how the Flow-3D could model a scouring phenomenon. They constructed a rectangular 14m long flume, with 1m width and 1m depth in the laboratory of the Amirkabir University of Technology.…”

Section: Experimental Modelmentioning

confidence: 99%

“…Since these structures are mainly built in groups and the flow characteristic would vary in peak and between spur dikes, researchers such as (Chang et al, 2013) and (Karami et al, 2014) investigated the scour depth in groups of spur dikes. Due to the greater interaction between flow and sediment and revealing Drink.…”

Section: Introductionmentioning

confidence: 99%

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Numerical scour modeling around parallel spur dikes in FLOW-3D

Pourshahbaz

Abbasi

Taghvaei

2017

Preprint

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Abstract. Spur dikes are some structures which are built in the flow path with the aim of changing flow characteristics in order to bed and bank protection in rivers. These sudden changes in properties caused by the existence of spur dikes, produces erosion and sedimentation around them. In this paper, effects of series of parallel spur dikes have been investigated numerically. For this purpose, by using experimental and numerical research results from technical literatures, the numerical model conducted in FLOW-3D commercial software and the data were compared with experimental and SSIIM results. The 10 results showed that Froude number and the ratio of U/Ucr affect the accuracy of the models. As a result, by discharge increasing, FLOW-3D models need to be calibrated again. Also, by using a calibrated FLOW-3D model, calculation accuracy of the scour depth at the bottom of the spur dikes becomes better and the accuracy level in the modeling of the surface morphology improves 7 percent more than SSIIM software in the bottom of the first spur dike, more than 80 percent at the bottom of the second spur dike and approximately 40 percent at the bottom of the last spur dike. 15

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Section: Discussion Open Accessmentioning

confidence: 99%

Section: Experimental Modelmentioning

confidence: 99%

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Numerical scour modeling around parallel spur dikes in FLOW-3D

Pourshahbaz

Abbasi

Taghvaei

2017

Preprint

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“…The similar problem of flow and scour phenomenon around spur dikes has been investigated and solved by means of experimental and numerical methods by Karami [14]. Since the double willow wattling was designed as permeable, not all energy of windward waves were reduced; however, the fill aggregate inside structures is an environment in which passing waves break and the energy dissipates well.…”

Section: Collecting Wave Data and Statistical Processingmentioning

confidence: 99%

The Efficiency of a Simple Stabilization Structure in a Water Reservoir

Pelikán

Šlezingr

Marková

et al. 2018

Pol. J. Environ. Stud.

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IntroductionBrno Valley Dam on the Svratka River (56.19 km) was put into operation in 1940 to decrease the damage caused by river flow during floods, to supply water to the city of Brno, and to control the flow under the dam. The area of the water reservoir is 259 ha with a total volume of 17.7 million m 3 . The banks of the reservoir in the Osada area are continuously damaged to an approximate length of 250 m, where the slope-to-vertical abrasion caverns reach heights of up to 5 m (detailed localization GPS: the banks from 49°14'44.063"N, 16°30'22.781"E to 49°14'45.298"N, 16°30'11.502"E).Pol. J. Environ. Stud. Vol. 27, No. 2 (2018), 793-799 AbstractThe Osada Recreation Area on the left bank of Brno Valley Dam (Czech Republic) represents a location that is extremely affected by the abrasion process due to a combination of adverse factors (fetch related to the dominant wind speed and direction over the water surface causing wave motion, the geological structure and morphology of banks, boat traffic). Our research focused on confirming the hypothesis that properly designed low-cost biotechnical structures can contribute to the active stabilization of a bank under special protection status. The hypothesis was verified by the method of wave train analysis (to prove wave height reduction) and spectral analysis (to prove wave energy dissipation due to breaking) of synchronized data collection of wave motion. The records of water surface motion were taken with the aid of electronic devices on the windward and leeward sides of the structure specifically assembled for the purposes of our research. Comparing the results of both sensors proved the effect of the stabilizing structure (double willow wattling) consisting in wave height and peak spectral energy density reduction. The leeward values decreased to approximately half the windward values due to the process of waves passing through the structure and energy dissipation.

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“…The results showed that there are two distinct zones with different depth and slope in the scour hole. The deeper hole was formed due to a horseshoe vortex, and the shallow hole was formed due to the secondary vortex [15]. Fang et al in 2013, studied the turbulent flow past a series of groins in a shallow, open channel by large-eddy simulation (LES).…”

Section: Introductionmentioning

confidence: 99%