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Abstract
This study intends to examine the suitability of magnesium ferrite nanofluid for heat transfer applications by measuring the thermophysical properties. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) are used to determine the surface morphology and size of magnesium ferrite nanoparticle. The ferrofluid is prepared by dispersing MgFe2O4 nanoparticles of size 80 nm in the Deionized water. The thermal conductivity, viscosity and surface tension of MgFe2O4 ferrofluid were investigated for five different volume fractions 0.01, 0.05, 0.10, 0.15, and 0.20, respectively. The hydrothermal synthesis method is employed for the preparation of magnesium ferrite nanoparticles. The outcome of the study indicates that thermal conductivity and viscosity of the ferrofluid is improved proportionally with intensification in volume fraction. Also noticed that the surface tension is decreased with the increasing volume fraction. The maximum enhancement of thermal conductivity and viscosity is 9.88% and 49% at the highest volume fraction of 0.20. The percentage of decrease in surface tension of the ferrofluid is observed as 45.8% at 0.20 volume fraction. The surface tension of ferrofluid decreases in connection with the rise in temperature from 293 to 333 K.
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