| Titre : | A novel explicit equation for friction factor in smooth and rough pipes (2009) |
| Auteurs : | Atakan Avci, Auteur ; Irfan Karagoz, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Transactions of the ASME . Journal of fluids engineering (Vol. 131 N° 6, Juin 2009) |
| Article en page(s) : | 04 p. |
| Note générale : | fluids engineering |
| Langues : | Anglais |
| Tags : | 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&issueid=27377 |
