Entropy approach for 2D velocity distribution in open-channel flow / Gustavo Marini in Journal of hydraulic research, Vol. 49 N° 6 (Novembre/Décembre 2011)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 784-790 Titre : Entropy approach for 2D velocity distribution in open-channel flow Type de document : texte imprimé Auteurs : Gustavo Marini, Auteur ; Giuseppe De Martino, Auteur ; Nicola Fontana, Auteur Année de publication : 2012 Article en page(s) : pp. 784-790 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Entropy Flow measurement Open-channel flow Shannon entropy Streamflow Velocity distribution 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 : In this paper, considering time-averaged velocity as a random variable, two-dimensional (2D) velocity distributions in open-channel flow have been derived based on the Shannon entropy concept and the principle of maximum entropy. The velocity distributions so derived have limited practical use, since they contain too many parameters that need to be experimentally calibrated and hence are not convenient to apply. This work develops a new entropy-based approach for deriving a 2D velocity distribution in open-channel flow, thereby investigating a rectangular geometric domain. The derived distribution is parsimonious, and the values determined using the proposed distribution are found to be in good agreement with the experimentally-measured velocity values. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.635889 [article] Entropy approach for 2D velocity distribution in open-channel flow [texte imprimé] / Gustavo Marini, Auteur ; Giuseppe De Martino, Auteur ; Nicola Fontana, Auteur . - 2012 . - pp. 784-790. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 784-790 Mots-clés : Entropy Flow measurement Open-channel flow Shannon entropy Streamflow Velocity distribution 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 : In this paper, considering time-averaged velocity as a random variable, two-dimensional (2D) velocity distributions in open-channel flow have been derived based on the Shannon entropy concept and the principle of maximum entropy. The velocity distributions so derived have limited practical use, since they contain too many parameters that need to be experimentally calibrated and hence are not convenient to apply. This work develops a new entropy-based approach for deriving a 2D velocity distribution in open-channel flow, thereby investigating a rectangular geometric domain. The derived distribution is parsimonious, and the values determined using the proposed distribution are found to be in good agreement with the experimentally-measured velocity values. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.635889

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