Approach to the Void Fraction Distribution Within a Hydraulic Jump in a Typified Usbr Ii Stilling Basin

Macián-Pérez, Juan Francisco; García-Bartual, Rafael; Huber, Boris; Bayón, Arnau; Morán, Francisco J Vallés

doi:10.3850/38wc092019-0716

Cited by 2 publications

(9 citation statements)

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“…Both differences could be a consequence of the energy dissipation devices of the USBR II stilling basin, causing affection to the aeration structure when compared to the CHJ case. This effect has been previously reported by the authors [9], leading to higher void fraction values. This observation is also in good agreement with the results pointing out an increase in flow depths for the hydraulic jump roller, already discussed in Section 3.1.…”

Section: Modelsupporting

confidence: 87%

“…Both differences could be a consequence of the energy dissipation devices of the USBR II stilling basin, causing affection to the aeration structure when compared to the CHJ case. This effect has been previously reported by the authors [9], leading to Figure 7b shows results concerning the normalized height at which this maximum void fraction is reached (ξ Cmax ). Clearly ξ Cmax increases as the distance to the hydraulic jump toe increases.…”

Section: Modelsupporting

confidence: 84%

“…Therefore, the aeration mechanism occurring in this region is not adequately reproduced by the model (Figure 6b). In fact, flow aeration in CFD modeling remains as one of its main challenges [7,9,18]. Highly aerated flows, like the one here presented, remark the limitations of the VOF approach.…”

Section: Modelmentioning

confidence: 80%

“…Expressions in Equations (18) and (19) were fitted to the laboratory measurements taken in selected sections along the stilling basin. The same procedure was carried out using void fraction values, drown from the numerical model [9].…”

Section: Theoretical Developmentmentioning

confidence: 99%

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Analysis of the Flow in a Typified USBR II Stilling Basin through a Numerical and Physical Modeling Approach

Macián-Pérez

García-Bartual

Huber

et al. 2020

Water

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Adaptation of stilling basins to higher discharges than those considered for their design implies deep knowledge of the flow developed in these structures. To this end, the hydraulic jump occurring in a typified United States Bureau of Reclamation Type II (USBR II) stilling basin was analyzed using a numerical and experimental modeling approach. A reduced-scale physical model to conduct an experimental campaign was built and a numerical computational fluid dynamics (CFD) model was prepared to carry out the corresponding simulations. Both models were able to successfully reproduce the case study in terms of hydraulic jump shape, velocity profiles, and pressure distributions. The analysis revealed not only similarities to the flow in classical hydraulic jumps but also the influence of the energy dissipation devices existing in the stilling basin, all in good agreement with bibliographical information, despite some slight differences. Furthermore, the void fraction distribution was analyzed, showing satisfactory performance of the physical model, although the numerical approach presented some limitations to adequately represent the flow aeration mechanisms, which are discussed herein. Overall, the presented modeling approach can be considered as a useful tool to address the analysis of free surface flows occurring in stilling basins.

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Section: Modelsupporting

confidence: 87%

“…Both differences could be a consequence of the energy dissipation devices of the USBR II stilling basin, causing affection to the aeration structure when compared to the CHJ case. This effect has been previously reported by the authors [9], leading to Figure 7b shows results concerning the normalized height at which this maximum void fraction is reached (ξ Cmax ). Clearly ξ Cmax increases as the distance to the hydraulic jump toe increases.…”

Section: Modelsupporting

confidence: 84%

Section: Modelmentioning

confidence: 80%

Section: Theoretical Developmentmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of the Flow in a Typified USBR II Stilling Basin through a Numerical and Physical Modeling Approach

Macián-Pérez

García-Bartual

Huber

et al. 2020

Water

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“…The results by these authors were used in section 5.5 to contrast the presented models. Moreover, a series of works directly related with the present research, were carried out to analyse the flow developed in this basin, from a physical and a numerical perspective [5], [85].…”

Section: Stilling Basins Reviewmentioning

confidence: 99%

Numerical and physical modelling approaches to the study of the hydraulic jump and its application in large-dam stilling basins

Pérez¹,

Francisco²

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Approach to the Void Fraction Distribution Within a Hydraulic Jump in a Typified Usbr Ii Stilling Basin

Cited by 2 publications

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Analysis of the Flow in a Typified USBR II Stilling Basin through a Numerical and Physical Modeling Approach

Analysis of the Flow in a Typified USBR II Stilling Basin through a Numerical and Physical Modeling Approach

Numerical and physical modelling approaches to the study of the hydraulic jump and its application in large-dam stilling basins

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