Prediction of thermal conductivity and convective heat transfer coefficient of nanofluids by local composition theory / Hosseini, S. M. in Journal of heat transfer, Vol. 133 N° 5 (Mai 2011)  

Public ISBD [article]  inJournal of heat transfer > Vol. 133 N° 5 (Mai 2011) . - pp. [052401/1-9] Titre : Prediction of thermal conductivity and convective heat transfer coefficient of nanofluids by local composition theory Type de document : texte imprimé Auteurs : Hosseini, S. M., Auteur ; A. Mohebbi, Auteur ; S. Ghader, Auteur Année de publication : 2011 Article en page(s) : pp. [052401/1-9] Note générale : Physique Langues : Anglais (eng) Mots-clés : Nanofluid Convective heat transfer coefficient Thermal conductivity Viscosity Local composition theory Nonrandom two liquid model Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, a new method based on the local composition theory has been developed to predict thermal conductivity, convective heat transfer coefficient, and viscosity of nanofluids. The nonrandom two liquid (NRTL) model is used for this purpose. The effects of temperature and particle volume concentration on thermal conductivity, convective heat transfer coefficient, and viscosity are investigated. The adjustable parameters of the NRTL model were obtained by fitting with experimental data. The results of the local composition theory are compared with the experimental data of CuO/water, Al2O3/water, TiO2/water, Cu/water, Au/water, Ni/water, TiO2/ethylene glycol, and Al/ethylene glycol (EG) nanofluids and a good agreement between the theory and the experimental data is observed. The absolute average deviation of the model for thermal conductivity was 1.51% in comparison to 42% in conventional models. This parameter for viscosity and convective heat transfer coefficient were 2.91% and 2.13%, respectively. Moreover, a new equation for calculating convective heat transfer coefficient of nanofluids is proposed and tested. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Prediction of thermal conductivity and convective heat transfer coefficient of nanofluids by local composition theory [texte imprimé] / Hosseini, S. M., Auteur ; A. Mohebbi, Auteur ; S. Ghader, Auteur . - 2011 . - pp. [052401/1-9]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 5 (Mai 2011) . - pp. [052401/1-9] Mots-clés : Nanofluid Convective heat transfer coefficient Thermal conductivity Viscosity Local composition theory Nonrandom two liquid model Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, a new method based on the local composition theory has been developed to predict thermal conductivity, convective heat transfer coefficient, and viscosity of nanofluids. The nonrandom two liquid (NRTL) model is used for this purpose. The effects of temperature and particle volume concentration on thermal conductivity, convective heat transfer coefficient, and viscosity are investigated. The adjustable parameters of the NRTL model were obtained by fitting with experimental data. The results of the local composition theory are compared with the experimental data of CuO/water, Al2O3/water, TiO2/water, Cu/water, Au/water, Ni/water, TiO2/ethylene glycol, and Al/ethylene glycol (EG) nanofluids and a good agreement between the theory and the experimental data is observed. The absolute average deviation of the model for thermal conductivity was 1.51% in comparison to 42% in conventional models. This parameter for viscosity and convective heat transfer coefficient were 2.91% and 2.13%, respectively. Moreover, a new equation for calculating convective heat transfer coefficient of nanofluids is proposed and tested. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]

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