Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/7158
Title: Numerical analysis of convective heat transfer of nanofluids in circular ducts with two-phase mixture model approach
Authors: Sert, İsmail Ozan
Uzol, Nilay Sezer
Keywords: [No Keywords]
Issue Date: 2016
Publisher: Springer
Abstract: Computational fluid dynamics simulations for initially hydro-dynamically fully developed laminar flow with nanofluids in a circular duct under constant wall temperature condition are performed with two-phase mixture model by using Fluent software. Thermal behaviors of the system are investigated for constant wall temperature condition for Al2O3/water nanofluid. Hamilton-Crosser model and the Brownian motion effect are used for the thermal conductivity model of nanofluid instead of the Fluent default model for mixtures which gives extraordinary high thermal conductivity values and is valid for macro systems. Also, thermal conductivity and viscosity of the base fluid are taken as temperature dependent. The effects of nanoparticle volume fraction, nanoparticle size, and inlet Peclet number on the heat transfer enhancement are investigated. The results are compared with single-phase results which give slightly lower heat transfer coefficient values than the results of two-phase mixture model.
URI: https://doi.org/10.1007/s00231-015-1655-7
https://hdl.handle.net/20.500.11851/7158
ISSN: 0947-7411
1432-1181
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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