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    Approximate Analytical Solution and Laboratory Experiments for Dam-Break Wave Tip Region in Triangular Channels

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    wang_et_al_2021.pdf (794.8Kb)
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    Publication date
    2021-10
    Author
    Wang, B.
    Zhang, F.
    Liu, X.
    Guo, Yakun
    Zhang, J.
    Peng, Y.
    Keyword
    Analytical solution
    Dam-break
    Hydraulic resistance
    Triangular channel
    Wave tip
    Rights
    (c) 2021 ASCE. This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)HY.1943-7900.0001928.
    Peer-Reviewed
    Yes
    Open Access status
    openAccess
    
    Metadata
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    Abstract
    Solutions for dam-break flow mainly developed for rectangular channels are not applicable to prediction of the propagation of the dam-break wave in frictional triangular channels. This study presents an approximate solution considering the frictional effect on the dam-break flow in a dry horizontal triangular channel. Wave tip velocity is solved by an implicit formula for the product of time and resistance coefficients. All other hydraulic properties in the wave tip region can be expressed as explicit functions of wave tip velocity. Meanwhile, laboratory experiments have been performed for obtaining water surface profiles of dam-break flow from which the position and velocity of the wave tip front have been derived. Results show that retardation of the wave front position is more significant with the increases in both resistance and time. The proposed analytical solution shows satisfactory agreement with measurements, and clarifies how the behavior of the dam-break wave tip is affected by channel geometry.
    URI
    http://hdl.handle.net/10454/18896
    Version
    Accepted manuscript
    Citation
    Wang B, Zhang F, Liu X et al (2021) Approximate Analytical Solution and Laboratory Experiments for Dam-Break Wave Tip Region in Triangular Channels. Journal of Hydraulic Engineering. 147(10)
    Link to publisher’s version
    https://doi.org/10.1061/(ASCE)HY.1943-7900.0001928
    Type
    Article
    Collections
    Engineering and Informatics Publications

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