Three-dimensional numerical modeling of reservoir sediment release / A. Khosronejad in Journal of hydraulic research, Vol. 46 N°2 (2008)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 46 N°2 (2008) . - p. 209-223 Titre : Three-dimensional numerical modeling of reservoir sediment release Titre original : Modélisation numérique tridimensionnelle de l'évacuation des sédiments d'un réservoir Type de document : texte imprimé Auteurs : A. Khosronejad, Auteur ; C. D. Rennie, Auteur ; A. A. Salehi Neyshabouri, Auteur Article en page(s) : p. 209-223 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : Bed evolution Numerical modeling Reservoir Sediment transport Three dimensional Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : For the computation of flow field and bed evolution in a water reservoir during the flushing process a fully three-dimensional hydrodynamic model, using a finite volume method to solve the Reynolds averaged Navier–Stokes equations, has been developed and combined with a three-dimensional sediment transport model. The hydrodynamic model is based the equations of mass and momentum conservation along with a standard k–ε turbulence closure model. The sediment transport model is based on the equation of convection/diffusion of sediment concentration and sediment continuity equation for calculating the sediment concentration and bed level change in the reservoir flushing process, respectively. Both the hydrodynamic and sediment transport models are developed in a boundary-fitted curvilinear coordinate system. The grid is adaptive in the vertical direction, and changes according to the calculated bed level. The hydrodynamic section of the model was verified using experimental and direct numerical simulations data, and the sediment concentration calculations compare well with the experimental results. Also a physical model study was carried out to verify the results of bed evolution at the upstream of a sluice gate. Good agreement is found between bed evolution in the numerical and physical models. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Three-dimensional numerical modeling of reservoir sediment release = Modélisation numérique tridimensionnelle de l'évacuation des sédiments d'un réservoir [texte imprimé] / A. Khosronejad, Auteur ; C. D. Rennie, Auteur ; A. A. Salehi Neyshabouri, Auteur . - p. 209-223. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 N°2 (2008) . - p. 209-223 Mots-clés : Bed evolution Numerical modeling Reservoir Sediment transport Three dimensional Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : For the computation of flow field and bed evolution in a water reservoir during the flushing process a fully three-dimensional hydrodynamic model, using a finite volume method to solve the Reynolds averaged Navier–Stokes equations, has been developed and combined with a three-dimensional sediment transport model. The hydrodynamic model is based the equations of mass and momentum conservation along with a standard k–ε turbulence closure model. The sediment transport model is based on the equation of convection/diffusion of sediment concentration and sediment continuity equation for calculating the sediment concentration and bed level change in the reservoir flushing process, respectively. Both the hydrodynamic and sediment transport models are developed in a boundary-fitted curvilinear coordinate system. The grid is adaptive in the vertical direction, and changes according to the calculated bed level. The hydrodynamic section of the model was verified using experimental and direct numerical simulations data, and the sediment concentration calculations compare well with the experimental results. Also a physical model study was carried out to verify the results of bed evolution at the upstream of a sluice gate. Good agreement is found between bed evolution in the numerical and physical models. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

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