| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 644448 | Applied Thermal Engineering | 2016 | 9 Pages |
•Measurement of thermal conductivity and viscosity of Fe3O4/EG nanofluid.•Experiments are undertaken for diff. concentration, temperature, sonication time.•Parameters are optimized for minimum viscosity and maximum thermal conductivity.•RSM is employed to evaluate linear, quadratic and interactive effects.•Statistical models are developed for viscosity and thermal conductivity.
Present study deals with experimental measurement of thermal conductivity and viscosity of Fe3O4 ethylene glycol nanofluid and multi-response optimization of conditions for maximum thermal conductivity and minimum viscosity of nanofluid. The thermal conductivity and viscosity were measured at 0.2, 0.5 and 0.8 vol% of concentration, 20, 50 and 80 °C temperature and 1, 2.5 and 4 h of ultrasonication time. Response surface methodology was employed to evaluate linear, quadratic and interactive effects of response variables. The multi response optimization yields the conditions: concentration 0.8 vol%, temperature 80 °C and ultrasonication time of 3.6 h. The optimum values of thermal conductivity and viscosity were 0.702 W/m K and 3.14 mPa s respectively and experimental values of thermal conductivity and viscosity were 0.694 W/m K and 3.10 mPa s with composite desirability (D) equal to 0.993.
