Documents disponibles écrits par cet auteur

A novel explicit equation for friction factor in smooth and rough pipes / Atakan Avci in Transactions of the ASME . Journal of fluids engineering, Vol. 131 N° 6 (Juin 2009) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 6 (Juin 2009) . - 04 p. Titre : A novel explicit equation for friction factor in smooth and rough pipes Type de document : texte imprimé Auteurs : Atakan Avci, Auteur ; Irfan Karagoz, Auteur Année de publication : 2009 Article en page(s) : 04 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : turbulence;  Reynolds  number;  surface  roughness;  pipes;  equations;  friction;  channels  (hydraulic  engineering) Résumé : In this paper, we propose a novel explicit equation for friction factor, which is valid for both smooth and rough wall turbulent flows in pipes and channels. The form of the proposed equation is based on a new logarithmic velocity profile and the model constants are obtained by using the experimental data available in the literature. The proposed equation gives the friction factor explicitly as a function of Reynolds number and relative roughness. The results indicate that the present model gives a very good prediction of the friction factor and can reproduce the Colebrook equation and its Moody plot. Therefore, the new approximation for the friction factor provides a rational, accurate, and practically useful method over the entire range of the Moody chart in terms of Reynolds number and relative roughness. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] A novel explicit equation for friction factor in smooth and rough pipes [texte imprimé] / Atakan Avci, Auteur ; Irfan Karagoz, Auteur . - 2009 . - 04 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 6 (Juin 2009) . - 04 p. Mots-clés : turbulence;  Reynolds  number;  surface  roughness;  pipes;  equations;  friction;  channels  (hydraulic  engineering) Résumé : In this paper, we propose a novel explicit equation for friction factor, which is valid for both smooth and rough wall turbulent flows in pipes and channels. The form of the proposed equation is based on a new logarithmic velocity profile and the model constants are obtained by using the experimental data available in the literature. The proposed equation gives the friction factor explicitly as a function of Reynolds number and relative roughness. The results indicate that the present model gives a very good prediction of the friction factor and can reproduce the Colebrook equation and its Moody plot. Therefore, the new approximation for the friction factor provides a rational, accurate, and practically useful method over the entire range of the Moody chart in terms of Reynolds number and relative roughness. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]