| Titre : | A simplified method for calculating heat transfer coefficients and friction factors in laminar pipe flow of non-Newtonian fluids (2012) |
| Auteurs : | D. A. Cruz, Auteur ; P. M. Coelho, Auteur ; M. A. Alves, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of heat transfer (Vol 134 N° 9, Septembre 2012) |
| Article en page(s) : | 06 p. |
| Note générale : | heat transfer |
| Langues : | Anglais |
| Index. décimale : | 536 (Chaleur. Thermodynamique) |
| Tags : | approximate method ; Nusselt number ; heat transfer ; fully developed pipe flow ; laminar generalized Newtonian fluid ; friction factor |
| Résumé : | In this work, we propose an approximate methodology to estimate the Nusselt number and friction factor in fully developed non-Newtonian laminar flow in circular pipes for a constant wall heat flux. The methodology was tested using several constitutive equations, including generalized Newtonian fluids and viscoelastic models such as the simplified Phan-Thien–Tanner (sPTT), Herschel–Bulkley, Bingham, Casson, and Carreau–Yasuda constitutive equations. The error of the approximate methodology was found to be smaller than 3.2%, except for the fluids with yield stress for which the maximum error increased to about 8% for the cases analyzed, which cover a wide range of shear viscosity curves. |
| DEWEY : | 536 |
| ISSN : | 0022-1481 |
| En ligne : | http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO000134000009091703000001&idtype=cvips&gifs=Yes&ref=no |
