EyĆ¼phan Manay and Bayram Sahin and Emre Mandev and Ibrahim Ates and Tuba Yetim
Determination of Thermophysical Properties of Water Based Magnetic Nanofluids
1089 - 1095
2016
10
8
International Journal of Chemical and Molecular Engineering
https://publications.waset.org/pdf/10005211
https://publications.waset.org/vol/116
World Academy of Science, Engineering and Technology
In this study, it was aimed to determine the thermophysical properties of two different magnetic nanofluids (NiFe2O4water and CoFe2O4water). Magnetic nanoparticles were dispersed into the pure water at different volume fractions from 0 vol. to 4 vol.. The measurements were performed in the temperature range of 15 oC55 oC. In order to get better idea on the temperature dependent thermophysical properties of magnetic nanofluids (MNFs), viscosity and thermal conductivity measurements were made. SEM images of both NiFe2O4 and CoFe2O4 nanoparticles were used in order to confirm the average dimensions. The measurements showed that the thermal conductivity of MNFs increased with an increase in the volume fraction as well as viscosity. Increase in the temperature of both MNFs resulted in an increase in the thermal conductivity and a decrease in the viscosity. Based on the measured data, the correlations for both the viscosity and the thermal conductivity were presented with respect to solid volume ratio and temperature. Effective thermal conductivity of the prepared MNFs was also calculated. The results indicated that water based NiFe2O4 nanofluid had higher thermal conductivity than that of the CoFe2O4. Once the viscosity values of both MNFs were compared, almost no difference was observed.
Open Science Index 116, 2016