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Temporal variation of vortex scour process around caisson piers / Gangarudraiah Veerappadevaru in Journal of hydraulic research, Vol. 50 N° 2 (Mars/Avril 2012) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 50 N° 2 (Mars/Avril 2012) . - pp. 200-207 Titre : Temporal variation of vortex scour process around caisson piers Type de document : texte imprimé Auteurs : Gangarudraiah Veerappadevaru, Auteur ; Thimmaiah Gangadharaiah, Auteur ; Thirumalai Ramaswamyiyenger Jagadeesh, Auteur Année de publication : 2012 Article en page(s) : pp. 200-207 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Bridge  pier  Caisson  Power  concept  River  engineering  Scour  Vortex Résumé : The concept of conservation of power during scour by the primary vortex formed in front of caisson piers is used to develop a relation for the temporal of scour depth variation. To test this relation, experiments were conducted using two sediment beds, three types of caisson piers and four relative flow depths. The agreement between the temporal variation of scour depths from the present approach and the literature data is good. The computed values of other researchers also agree fairly with the present proportionality constants. An expression for scour duration to reach the equilibrium scour depth is deduced from the power concept based on long duration literature data. The validity of this expression is verified for the equilibrium duration concept. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2012.666832 [article] Temporal variation of vortex scour process around caisson piers [texte imprimé] / Gangarudraiah Veerappadevaru, Auteur ; Thimmaiah Gangadharaiah, Auteur ; Thirumalai Ramaswamyiyenger Jagadeesh, Auteur . - 2012 . - pp. 200-207. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 50 N° 2 (Mars/Avril 2012) . - pp. 200-207 Mots-clés : Bridge  pier  Caisson  Power  concept  River  engineering  Scour  Vortex Résumé : The concept of conservation of power during scour by the primary vortex formed in front of caisson piers is used to develop a relation for the temporal of scour depth variation. To test this relation, experiments were conducted using two sediment beds, three types of caisson piers and four relative flow depths. The agreement between the temporal variation of scour depths from the present approach and the literature data is good. The computed values of other researchers also agree fairly with the present proportionality constants. An expression for scour duration to reach the equilibrium scour depth is deduced from the power concept based on long duration literature data. The validity of this expression is verified for the equilibrium duration concept. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2012.666832