Numerical and experimental models applied to an ogee crest spillway and roller bucket stilling basin

Morais, Vitor Hugo Pereira de; Gireli, Tiago Zenker; Vatavuk, Paulo

doi:10.1590/2318-0331.252020190005

Cited by 5 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They come in both porous and non-porous varieties, and they may be used to quantify mass flows, heat streams, and applied forces. The number of elements in the computational mesh depends on the transit flow, which is directly acquired from the section where the baffle is positioned [48]. The flow rate was measured using baffle, and the X-minimum boundary condition was used with a specified pressure.…”

Section: Discussionmentioning

confidence: 99%

Flow Discharge Prediction Study Using a CFD-Based Numerical Model and Gene Expression Programming

Mozaffari

Amini

Mehdipour

et al. 2022

Water

View full text Add to dashboard Cite

The significance of spillways is to allow the flood to be safely discharged from downstream. There is a strong correlation between the poor design of spillways and the failures of dams. In order to address this concern, the present study investigates the flow over the Nazloo-ogee spillway using the CFD 3D numerical model and an artificial intelligence method called Gene Expression Programming (GEP). In a physical model, discharge and flow depths were calculated for 21 different total heads. Among different turbulence models, the RNG turbulence model achieved the maximum compatibility in computational fluid dynamic simulation. In addition, GEP was used to estimate Q, in which 70% of collected data was dedicated to training and 30% to testing. R2, RMSE, and MAE were obtained as performance criteria, and the new mathematical equation for the prediction of discharge was obtained using this model. Finally, the numerical model and GEP outputs were compared with the experimental data. According to the results, the numerical model and GEP exhibited a high level of correspondence in simulating flow over an ogee-crested spillway.

show abstract

Section: Discussionmentioning

confidence: 99%

Flow Discharge Prediction Study Using a CFD-Based Numerical Model and Gene Expression Programming

Mozaffari

Amini

Mehdipour

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…In general, the continuity of mass and Navier Stocks equations are partial nonlinear differential equations and not easy to solve numerically or analytically, if not impossible [22]. It also offers different calculation models that the user can activate to fulfill hydraulic requirements [23]. Flow-3D employs a self-correcting approach as well as an autonomous convergence criterion setting that adapts to whatever occurs during the numerical solution process.…”

Section: Numerical Modelmentioning

confidence: 99%

Comparison Between Numerical Flow3d Software and Laboratory Data, For Sediment Incipient Motion.

Kosaj

Alboresha

Sulaiman

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

In this paper, the laboratory data were compared with computational fluid dynamics (CFD) Flow3D for predicting the beginning of sediment incipient motion in rigid boundary channel for two types of sands, irrigation, and sewer types, in rectangular flume (0.5*0.5)m cross-section. Tests were made for soil samples with different diameters, specific weights. The testing was performed in slopes ranging from 0.001-0.003 for irrigation types and 0.0025-0.025 for sewer types depending on the original parameter. The Flow-3D software has simulated the laboratory work using scouring models MPM and Nielsen. the relation between sediment incipient motion velocity, particle size, and channel bed slope was predicted. The results were relatively more than laboratory data for the MPM model, while grating convergence for Nielsen model, especially for small diameter sediment. Also, the laboratory results are more close to the results of Flow3D using the Nielsen model when the value of bed slope of the channel is greater, and vice versa when the slope decreases.

show abstract

“…Several studies were carried out to verify numerical results using physical models for different spillway types by using Flow 3D software [19][20][21][22][23][24][25][26]. All of them found a good agreement between a result of the numerical and physical model.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Flow Patterns over Spillway with CFD (Case Study: Haditha Dam in Iraq)

Almawla¹,

Kamel²,

Lateef³

2021

IJDNE

View full text Add to dashboard Cite

Spillways are designing to release surplus water over a volume of storage. The excess water flows from the top of the reservoir and is carried back to the river by a spillway. Many radial gates were destroyed under hydrodynamic load. Radial gate connectors are susceptible to fatigue failure due to excessive vibration; therefore, gate vibration during operation must be investigated to confirm safe operation at the design water pressure. Several studies were carried out to analyse and simulation of flow over the spillway. In this article, the flow pattern over the Haditha dam spillway has been simulated using computational fluid dynamics (CFD). The numerical model was performed using Ansys Fluent 2020 R1 to simulate the flow properties; determination of cavitation damage at three discharges corresponding in the design of Haditha dam are 4700, 7140, and 7900 m3/s. In addition to finding the effect of gate vibration under dynamic water loads. The Realisable k-ɛ turbulence model was utilised with the volume of fluid (VOF) model to simulate the interaction between air and water phases. The validation of the numerical model was achieved by comparing it with a physical model. The physical model of the Haditha Dam spillway was made from iron with a scale of 1:110. It has been designed and constructed in a hydraulic laboratory according to the modelling principle of the hydraulic structure. The results showed that a high agreement between the physical and numerical model and the k-ɛ turbulence model could simulate the Haditha dam spillway with low cost and few times. The cavitation damage may occur at the region start at the end of the arching spillway to stretches downstream, and there is no damage of gate vibration under dynamic water load.

show abstract

Numerical and experimental models applied to an ogee crest spillway and roller bucket stilling basin

Cited by 5 publications

References 9 publications

Flow Discharge Prediction Study Using a CFD-Based Numerical Model and Gene Expression Programming

Flow Discharge Prediction Study Using a CFD-Based Numerical Model and Gene Expression Programming

Comparison Between Numerical Flow3d Software and Laboratory Data, For Sediment Incipient Motion.

Modelling of Flow Patterns over Spillway with CFD (Case Study: Haditha Dam in Iraq)

Contact Info

Product

Resources

About