Optimising The Mixing Ratio of Hybrid Nanofluids Based on Their Thermal Conductivity and Dynamic Viscosity Properties Using Design of Experiment Method

The hybrid nanofluid's synergetic effect is proportional to the mixing ratio. However, One Factor at A Time (OFAT) method only displays optimised ratio when used in respective experiments specified. Thus, purpose of this study optimise nanoparticle using Design Experiment (DOE) Expert 11 cover entire range ratios with fewest possible. prepared nanofluid comprises Titanium Dioxide (TiO2) and Graphene Nanoplatelets (GNP) a concentration 0.3vol%, ranging from 1:9 9:1, temperature 30oC 60oC. DOE generates 1:9, 1:1, 9:1 ratios. ANOVA analysis was generate model for thermal conductivity. Additionally, optimisation results indicate that 1:4 (TiO2-GNP) 40oC are parameters. difference between measured predicted conductivity values less than 5%.