Flow due to multiple jets downstream of a barrage: Experiments, 3-D CFD and depth-averaged modelling

Penny Jeffcoate, Peter Stansby, David Apsley

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    The flow through and downstream of a row of seven open draft tubes in a barrage has been investigated through laboratory experiments in a wide flume, a three-dimensional (3D) computational fluid dynamics simulation, and a two-dimensional depth-averaged computation. Agreement between the experiments and the 3D modeling is shown to be good, including the prediction of an asymmetric Coandă effect. One aim is to determine the distance downstream at which depth-averaged modeling provides a reasonable prediction; this is shown to be approximately 20 tube diameters downstream of the barrage. Upstream of this, the depth-averaged modeling inaccurately predicts water level, bed shear, and the 3D flow field. The 3D model shows that bed shear stress can be markedly magnified near the barrage, particularly where the jets become attached.
    Original languageEnglish
    Pages (from-to)754-762
    Number of pages9
    JournalJournal of Hydraulic Engineering
    Volume139
    Issue number7
    Early online date22 Dec 2012
    DOIs
    Publication statusPublished - Jul 2013

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    barrage
    Computational fluid dynamics
    Water levels
    modeling
    Shear stress
    Flow fields
    experiment
    bottom stress
    Experiments
    prediction
    computational fluid dynamics
    flow field
    shear stress
    Computer simulation
    water level
    simulation

    Cite this

    Jeffcoate, Penny ; Stansby, Peter ; Apsley, David. / Flow due to multiple jets downstream of a barrage: Experiments, 3-D CFD and depth-averaged modelling. In: Journal of Hydraulic Engineering. 2013 ; Vol. 139, No. 7. pp. 754-762.
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    Flow due to multiple jets downstream of a barrage: Experiments, 3-D CFD and depth-averaged modelling. / Jeffcoate, Penny; Stansby, Peter; Apsley, David.

    In: Journal of Hydraulic Engineering, Vol. 139, No. 7, 07.2013, p. 754-762.

    Research output: Contribution to journalArticle

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