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Obstacle-Reynolds-number based analysis of local scour at submerged cylinders / Thomas Euler in Journal of hydraulic research, Vol. 49 N° 2 (Mars/Avril 2011) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 49 N° 2 (Mars/Avril 2011) . - pp. 267-271 Titre : Obstacle-Reynolds-number based analysis of local scour at submerged cylinders Type de document : texte imprimé Auteurs : Thomas Euler, Auteur ; Jurgen Herget, Auteur Année de publication : 2011 Article en page(s) : pp. 267-271 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Local  scour  Obstacle  mark  Obstacle  Reynolds  number  Open  channel  flow  Submerged  obstacle 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 : A simple process-based, analytical approach is developed and validated herein to determine the local scour at obstacles in the fluvial environment. It is based on the obstacle Reynolds and Froude numbers. Clear-water flume experiments were conducted to investigate the local scour depths at submerged cylinders in coarse uniform sand. The resulting scour depths were correlated with an analytical model and validated with two data sets on local scour at submerged and emergent cylinders. The size of the projected frontal obstacle area in relation to the mean flow velocity has a significant effect on the scour hole shape and depth. A power law function is derived that satisfactorily describes the present scour depth data. The approach is limited to near-equilibrium clear-water scour, uniform sediment and excludes particle density effects. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2010.547719 [article] Obstacle-Reynolds-number based analysis of local scour at submerged cylinders [texte imprimé] / Thomas Euler, Auteur ; Jurgen Herget, Auteur . - 2011 . - pp. 267-271. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 2 (Mars/Avril 2011) . - pp. 267-271 Mots-clés : Local  scour  Obstacle  mark  Obstacle  Reynolds  number  Open  channel  flow  Submerged  obstacle 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 : A simple process-based, analytical approach is developed and validated herein to determine the local scour at obstacles in the fluvial environment. It is based on the obstacle Reynolds and Froude numbers. Clear-water flume experiments were conducted to investigate the local scour depths at submerged cylinders in coarse uniform sand. The resulting scour depths were correlated with an analytical model and validated with two data sets on local scour at submerged and emergent cylinders. The size of the projected frontal obstacle area in relation to the mean flow velocity has a significant effect on the scour hole shape and depth. A power law function is derived that satisfactorily describes the present scour depth data. The approach is limited to near-equilibrium clear-water scour, uniform sediment and excludes particle density effects. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2010.547719