Experimental investigation of reservoir geometry effect on dam-break flow / Atabak Feizi Khankandi in Journal of hydraulic research, Vol. 50 N° 4 (Juillet/Août 2012)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 50 N° 4 (Juillet/Août 2012) . - pp. 376-387 Titre : Experimental investigation of reservoir geometry effect on dam-break flow Type de document : texte imprimé Auteurs : Atabak Feizi Khankandi, Auteur ; Ahmad Tahershamsi, Auteur ; Soares-Frazão, Sandra, Auteur Année de publication : 2012 Article en page(s) : pp. 376-387 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : ADV sensor Dam-break High-speed camera Reservoir shape Ultrasonic Résumé : Experimental data related to the analysis of reservoir geometry effects on dam-break flows are provided. Four different reservoir plan shapes were considered, namely a long reservoir, a wide, a trapezoidal shaped and one with a 90° bend. Time variations of the water level were measured with ultrasonic sensors and a high-speed camera. Velocity components were recorded using an acoustic Doppler velocimeter. It was observed that 2D effects are enhanced in the wide and trapezoidal reservoirs and that the long and 90° bend reservoirs produce similar results, with a mainly 1D flow. Finally, discharge estimates based on the water level and velocity data were compared with predictions by empirical formula. Due to the simplified geometry considered, existing formulae are only indicative and cannot be directly applied to practice. ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/full/10.1080/00221686.2012.690974 [article] Experimental investigation of reservoir geometry effect on dam-break flow [texte imprimé] / Atabak Feizi Khankandi, Auteur ; Ahmad Tahershamsi, Auteur ; Soares-Frazão, Sandra, Auteur . - 2012 . - pp. 376-387. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 50 N° 4 (Juillet/Août 2012) . - pp. 376-387 Mots-clés : ADV sensor Dam-break High-speed camera Reservoir shape Ultrasonic Résumé : Experimental data related to the analysis of reservoir geometry effects on dam-break flows are provided. Four different reservoir plan shapes were considered, namely a long reservoir, a wide, a trapezoidal shaped and one with a 90° bend. Time variations of the water level were measured with ultrasonic sensors and a high-speed camera. Velocity components were recorded using an acoustic Doppler velocimeter. It was observed that 2D effects are enhanced in the wide and trapezoidal reservoirs and that the long and 90° bend reservoirs produce similar results, with a mainly 1D flow. Finally, discharge estimates based on the water level and velocity data were compared with predictions by empirical formula. Due to the simplified geometry considered, existing formulae are only indicative and cannot be directly applied to practice. ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/full/10.1080/00221686.2012.690974

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