Using statistical and optimization tools for determining optimal formulations and operating conditions for Al2O3/(EG + Water) nanofluids for cooling system

•Optimizing various mixture of EG and water containing Al2O3 by NSGA-II algorithm.•Considering 0–1.5% solid volume fraction and temperature of 20–60 °C.•Suggesting new correlations for viscosity and thermal conductivity of nanofluids.•Obtaining optimum data for each nanofluid at various temperatures and concentrations.•Proposing correlations based on thermal conductivity and viscosity for optimum data.