Graphene oxide/silica composite�s rheological behavior was studied in this investigation. This composite was made to reduce the cost of industrial usages. The volume fractions investigated from 0.1 to 1.0 (GO 30�SiO2 70), the shear rates investigated from 12.23 to 122.3 s�1, and the temperatures investigated from 25 to 50 °C. To study the characterization of each solid and the composite, the XRD and the FESEM tests were done. The results of the viscosity investigation revealed the non-Newtonian behavior. After that, a numerical study was done to present a correlation and train an artificial neural network model. These numerical studies were done for both 12.23 and 122.3 s�1 shear rates. The novel equation tolerances were 1.932 and 1.338 for 12.23 and 122.3 s�1 shear rates, while for the artificial neural network model, the tolerances were 1.46196 and 1.25386 for 12.23 and 122.3 s�1 shear rates. This means, after the model was trained, the deviation decreased around �0.46999 and �0.08467 for 12.23 and 122.3 s�1 shear rates. This nanofluid can be employed in industrial systems. © 2021, Akadémiai Kiadó, Budapest, Hungary.