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    Numerical and experimental turbulence studies on shallow open channel flows

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    pu_shao_huang_jhr.pdf (630.0Kb)
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    Publication date
    2014-03
    Author
    Pu, Jaan H.
    Shao, Songdong
    Huang, Y.
    Keyword
    k-ε model; Laboratory experiment; Power spectrum; Rough bed flow; Smooth bed flow; SGUM model; SWEs model; TKE
    Rights
    © 2014 Elsevier B.V. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    
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    Abstract
    Based on the previous studies, the shallow water equations (SWEs) model was proven to be insufficient to consider the flow turbulence due to its simplified Reynolds-averaged form. In this study, the k-ε model was used to improve the ability of the SWEs model to capture the flow turbulence. In terms of the numerical source terms modelling, the combined k-ε SWEs model was improved by a recently proposed surface gradient upwind method (SGUM) to facilitate the extra turbulent kinetic energy (TKE) source terms in the simulation. The laboratory experiments on both the smooth and rough bed flows were also conducted under the uniform and non-uniform flow conditions for the validation of the proposed numerical model. The numerical simulations were compared to the measured data in the flow velocity, TKE and power spectrum. In the power spectrum comparisons, a well-studied Kolmogorov’s rule was also employed to complement both the numerical and experimental results and to demonstrate that the energy cascade trend was well-held by the investigated flows.
    URI
    http://hdl.handle.net/10454/8341
    Version
    Accepted Manuscript
    Citation
    Pu JH, Shao S and Huang Y (2014) Numerical and experimental turbulence studies on shallow open channel flows. Journal of Hydro-Environment Research. 8(1): 9-19.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.jher.2012.12.001
    Type
    Article
    Collections
    Engineering and Informatics Publications

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