Water-Based Fe<sub>2</sub>O<sub>3</sub> Nanofluid Characterization: Thermal Conductivity and Viscosity Measurements and Correlation

Advances in Mechanical Engineering - Tập 4 - Trang 674947 - 2012
Laura Colla1, Laura Fedele1, Mauro Scattolini1, Sergio Bobbo1
1Consiglio Nazionale delle Ricerche, Istituto per le Tecnologie della Costruzione, Corso Stati Uniti, 4, 35127 Padova, Italy

Tóm tắt

An experimental investigation on water-based nanofluids containing iron oxide (Fe2O3) in concentrations ranging between 5 and 20% in mass is presented. The purpose of this study is to measure thermal conductivity and dynamic viscosity of these fluids, as a starting point to study the heat transfer capability. The stability of the nanofluids was verified by pH and Zeta potential measurements. A dynamic light scattering (DLS) technique was used to obtain the mean nanoparticle diameters. It was found that thermal conductivity of these nanofluids improved with temperature and particles concentration. The temperature and nanoparticle concentration effects on viscosity were analyzed, obtaining a significant increase with respect to water. All the fluids exhibited a Newtonian behaviour. The experimental values were compared with some theoretical models for both thermal conductivity and dynamic viscosity.

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Advances in Mechanical Engineering

Tập 4

674947

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