Study of Rheological Behavior, Economic Performance and Development of a Model for MWCNT-ZnO (30:70)/10W40 Hybrid Nanofluid Using Response Surface Methodology

The aim of this article is an empirical investigation of the MWCNT and ZnO (30:70)/10W40 HNF against SR, SVF, and T. In this study, the nanoparticles (NPs) are examined with SVF = 0.05%-1% and T = 5–55 °C. After adding NPs to 10W40 engine oil, non-Newtonian behavior is observed. Optimizing the viscosity behavior of NF is another goal of this study, which has been achieved with the special combination of NPs and adding them to the base fluid. The present introduced NF has given a more controlled viscosity and a cheaper price in competition with the other three reviewed NFs available in the literature. To predict the viscosity, RSM is used, which is based on the experimental results. The margin of deviation (MOD) is less than ±5%. Also, the sensitivity analysis in different SVFs and temperatures is analyzed separately.