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Flow over Broad Crested Weirs: Comparison of 2D and 3D Models
Department of Civil Engineering, Al-Mustansiriayah University, Baghdad 1001, Iraq.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering. Department of Civil Engineering, Al-Mustansiriayah University, Baghdad 1001, Iraq.ORCID iD: 0000-0003-0203-918X
Department of Civil Engineering, Al-Mustansiriayah University, Baghdad 1001, Iraq.
Department of Civil Engineering, Al-Mustansiriayah University, Baghdad 1001, Iraq.
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2017 (English)In: Journal of Civil Engineering and Architecture, ISSN 1934-7359, E-ISSN 1934-7367, Vol. 11, no 8, p. 769-779Article in journal (Refereed) Published
Abstract [en]

The flow over broad-crested weirs was simulated by computational fluid dynamic model. The water surface profile over broad crested weir was measured in a laboratory model and validated using two and three dimensional Fluent programs. The Reynolds Averaged Navier-Stokes equations coupled with the turbulent standard (k-ε) model and volume of fluid method were applied to estimate the water surface profile. The results of numerical model were compared with experimental results to evaluate the ability of model in describing the behaviour of water surface profile over the weir. The results indicated that the 3D required more time in comparison with 2D results and the flow over weir changed from subcritical flow at the upstream (U/S) face of weir to critical flow over the crest and to supercritical flow at downstream (D/S). A reasonable agreement was noticed between numerical results and experimental observations with mean error less than 2 %.

Place, publisher, year, edition, pages
David Publishing Company, 2017. Vol. 11, no 8, p. 769-779
Keyword [en]
Broad-crested weir, discharge coefficient, subcritical flow, numerical CFD, Fluent.
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-66608DOI: 10.17265/1934-7359/2017.08.005OAI: oai:DiVA.org:ltu-66608DiVA, id: diva2:1157929
Note

Validerad;2017;Nivå 1;2017-11-20 (rokbeg)

Available from: 2017-11-17 Created: 2017-11-17 Last updated: 2017-11-24Bibliographically approved

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