Numerical investigation of energy dissipation rate in stepped spillways with lateral slopes using experimental model development approach

Arjenaki, Majid Omidi; Sanayei, Hamed Reza Zarif

doi:10.1007/s40808-020-00714-z

Cited by 18 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is thought that more air enters the flow due to the step geometry of the TSS. The same situation has been encountered in the literature studies (Arjenaki et al, 2020;Felder et al, 2012b;Ghaderi et al, 2020) for different step geometries. Figure 11 shows the three-dimensional simulation output of the total hydraulic head for all models (for Q=0.0121 m3/s).…”

Section: Resultssupporting

confidence: 75%

“…The use of the Computational Fluid Dynamics (CFD) methods increases after the development of computer technology. Many researchers have analyzed the effect of different step geometries on energy dissipation rates numerically (Arjenaki et al, 2020;Ashoor and Riazi, 2019;Ghaderi et al, 2021Ghaderi et al, , 2020Hekmatzadeh et al, 2018;Li et al, 2020Li et al, , 2018Mohammad et al, 2016;Reeve et al, 2019;Shahheydari et al, 2015;Tabbara et al, 2005;Alkhamis et al 2021). In this study, trapezoidal stepped spillways (TSS), which have not been studied in the literature, were analyzed numerically with Flow3D software.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy dissipation performance of the trapezoidal stepped spillway

Ikinciogullari

2021

JER is an international, peer-reviewed journal that publishes f

View full text Add to dashboard Cite

Stepped spillways are a more effective type of spillway in energy dissipation than conventional chute channels. Therefore, the dimensions of the energy breaker at the downstream of the stepped spillways are lower. It is an alternative especially for the downstream pool that cannot be built in sufficient length due to the terrain conditions. In this study, the energy dissipation performance of the trapezoidal stepped spillways was investigated numerically by using Flow3D software. Four different models and three different discharges were utilized for this aim. According to the results, the trapezoidal stepped spillway is more effective up to 30% than classical stepped spillways in energy dissipation. The depth of the trapezoidal step and the bottom base length of the trapezoid significantly affected the energy dissipation rate for the trapezoidal stepped spillway.

show abstract

Section: Resultssupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Energy dissipation performance of the trapezoidal stepped spillway

Ikinciogullari

2021

JER is an international, peer-reviewed journal that publishes f

View full text Add to dashboard Cite

show abstract

“…The stepped shape of the CSS is considered to cause more air to enter the flow. A similar issue arose in the literature investigations for various step geometries (Felder et al 2012b;Arjenaki & Sanayei 2020;Ghaderi et al 2020). The twodimensional velocity vectors of all models were given as shown in Figure 11 (at the center of the channel).…”

Section: Flow Characteristicsmentioning

confidence: 76%

“…For example, the numerical studies on stepped spillways have increased daily. The researchers used various step and threshold geometries or chute angles to analyze the stepped spillway flow dynamics and energy dissipation (Tabbara et al 2005;Shahheydari et al 2015;Mohammad et al 2016;Hekmatzadeh et al 2018;Li et al 2018Li et al , 2020Ashoor & Riazi 2019;Reeve et al 2019;Arjenaki & Sanayei 2020;Ghaderi et al 2020Ghaderi et al , 2021Ikinciogullari 2021).…”

Section: Introductionmentioning

confidence: 99%

Stepped spillway design for energy dissipation

Ikinciogullari

2023

Water Supply

View full text Add to dashboard Cite

Important water structures known as stepped spillways are used to dissipate energy, aerate rivers, and reduce the cost of the downstream pool. The aim of this study is to increase the energy dissipation rate by proposing an alternative design to the flat stepped spillways, which are frequently used in practice. For that reason, the Circular Stepped Spillway (CSS) has been constructed and numerically investigated in this paper. The energy dissipation rate of the CSS and the flat stepped spillway has been compared using three different models and discharges. According to the simulation findings, the CSS performs better as the step radius gets smaller. The CSS models with step depths of 0.50, 1.50, and 2.50 cm have dissipated up to 21.4, 38, and 50.7% more energy than the flat stepped spillway, respectively.

show abstract

“…Li et al (2019) provided numerical insight into the hydraulic characteristics of V-shaped spillways with several step layouts. Arjenaki & Sanayei (2020) carried out a numerical analysis to investigate the effects of different types of step geometries on the energy dissipation rate of stepped spillways. The results showed that some step geometries with rectangular blocks can increase energy dissipation rates by as much as two times.…”

Section: Introductionmentioning

confidence: 99%

The effect of triangular prismatic elements on the hydraulic performance of stepped spillways in the skimming flow regime: an experimental study and numerical modeling

Roushangar

Akhgar

Shahnazi

2022

Journal of Hydroinformatics

View full text Add to dashboard Cite

The stepped spillway is a cost-effective hydraulic structure to dissipate the energy of large water flow over the spillway of a dam. In this study, the focus was placed on the effects of triangular prismatic elements (TPEs) on the hydraulic performance of a stepped spillway. Nine stepped spillway models were experimentally and numerically investigated with different shapes and layouts of TPEs. To adopt a proper turbulent model, RNG k-ε and standard k-ε models were utilized. The computational model results satisfactorily simulated the complex flow over the stepped spillway of experiment cases, including velocity distributions and pressure profiles on the step surfaces. The results indicated that the installation of TPEs on stepped spillways can be an effective way to reduce cavitation effects. Installing TPEs on stepped spillways increased the energy dissipation rate up to 54%. The performance of stepped spillways was improved when TPEs were spaced more closely together. Furthermore, the relationships between the roughness coefficient (f) and the ratio of the critical depth to the step roughness (yc/k) were obtained with high accuracy using the experimental data.

show abstract

Numerical investigation of energy dissipation rate in stepped spillways with lateral slopes using experimental model development approach

Cited by 18 publications

References 12 publications

Energy dissipation performance of the trapezoidal stepped spillway

Energy dissipation performance of the trapezoidal stepped spillway

Stepped spillway design for energy dissipation

The effect of triangular prismatic elements on the hydraulic performance of stepped spillways in the skimming flow regime: an experimental study and numerical modeling

Contact Info

Product

Resources

About