Curve-fitting on experimental data for predicting the thermal-conductivity of a new generated hybrid nanofluid of graphene oxide-titanium oxide/water

The objective of this experimental study is to study the effects of a hybrid utilization of graphene oxide (GO) and titanium oxide (TiO2) nano-materials on the water thermal-conductivity. The experiments were carried out for different concentrations of 0.05, 0.1, 0.2, 0.4, 0.6, 0.8 and 1% and in the temperature range of 20 to 50°C. The experiments showed that higher temperature and concentrations of nano-materials result in a higher the thermal-conductivity. The maximum thermal-conductivity enhancement was 32.8%. Moreover, a new accurate correlation for the thermal-conductivity was presented based on the experimental data obtained in the laboratory in terms of temperature and nano-materials volume fraction. •Using curve-fitting to propose a correlation for predicting thermal conductivity.•Preparing homogeneous and stable samples of GO-TiO2/water hybrid nanofluid.•Presenting effects of temperature and GO-TiO2 concentration on thermal conductivity.•32.8% improvement in thermal conductivity of hybrid nanofluid compared to water.