Rheological properties of synthesized Fe3O4 in non-newtonian fluids

Abstract

In this study, the viscosity features of non-Newtonian fluid were investigated adding synthesized Fe3O4 in the distilled water, paraffin oil, glycerine and engine oil for thermal system application. Iron oxides nanoparticles were fabricated using co-precipitation method. XRD pattern confirmed the magnetite cubical spinel structure with Miller indices (220), (311), (400), (422), (511) and (440). The average grain size of Fe3O4 nanoparticles was calculated approximately 20.57 nm using Scherrer formula. Morphology of iron oxides nanoparticles was examined by SEM VEGA3 TESCAN machine at 20 Kev which showed negilgible agglomeration in the magnitite particles. EDX was performed to confirm the elements of Fe, C and O content in the sample. The saturation magnetization (Ms) of iron oxides nanoparticles was measured using Vibrating Sample Magnetometer (VSM-100), China. Saturation magnetization (Ms) versus magnetic field (H) was drawn to assess the superparamagnetic curve. The viscosity of non-Newtonian fluid was profoundly affected by shear rate, temperature and time during experiments. This study revealed that rheological properties of non-Newtonian fluid such as distilled water, engine oil, paraffin oil and glycerine may be modified adding iron oxide nanoparticles in base fluid.