Study of velocity field at model sideweir using visualization method / Gorazd Novak in Journal of hydraulic research, Vol. 50 N° 1 (Janvier/Février 2012)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 50 N° 1 (Janvier/Février 2012) . - pp. 129-133 Titre : Study of velocity field at model sideweir using visualization method Type de document : texte imprimé Auteurs : Gorazd Novak, Auteur ; Franc Steinman, Auteur ; Matej Müller, Auteur Année de publication : 2012 Article en page(s) : pp. 129-133 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Laboratory experiment Model study Open channel flow Sideweir Velocity field Visualization Résumé : A visualization method was employed for accurate non-intrusive measurement of velocity fields at a physical model of a sharp-crested rectangular sideweir under subcritical flow. The experimental observation of velocity vectors at various horizontal planes over the entire width of the main channel confirms that the flow conditions at sideweir are non-uniform. The coefficients of non-uniform velocity distribution were in the range from 1 to 1.1. The present study focuses on the relation between the longitudinal components of the overflow velocities and the corresponding cross-sectional average velocities in the main channel, detailed as a function of flow depth and of location along the sideweir crest. For different sideweir geometries, these coefficients varied between 1 and 1.2. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.648766 [article] Study of velocity field at model sideweir using visualization method [texte imprimé] / Gorazd Novak, Auteur ; Franc Steinman, Auteur ; Matej Müller, Auteur . - 2012 . - pp. 129-133. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 50 N° 1 (Janvier/Février 2012) . - pp. 129-133 Mots-clés : Laboratory experiment Model study Open channel flow Sideweir Velocity field Visualization Résumé : A visualization method was employed for accurate non-intrusive measurement of velocity fields at a physical model of a sharp-crested rectangular sideweir under subcritical flow. The experimental observation of velocity vectors at various horizontal planes over the entire width of the main channel confirms that the flow conditions at sideweir are non-uniform. The coefficients of non-uniform velocity distribution were in the range from 1 to 1.1. The present study focuses on the relation between the longitudinal components of the overflow velocities and the corresponding cross-sectional average velocities in the main channel, detailed as a function of flow depth and of location along the sideweir crest. For different sideweir geometries, these coefficients varied between 1 and 1.2. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.648766

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