▎ 摘　　要

Investigation on the ultrasonic-assisted synthesis of graphene oxide-CuO (GO-CuO) nanocomposite and its nanofluid was accomplished in this work for intensified heat transfer properties. The successful formation of the GO-CuO nanocomposite has been confirmed with UV/vis spectroscopic analysis, x-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and energy dispersive X-ray spectroscopy (EDX) analysis. The thermal properties like thermal conductivity of the prepared GO-CuO nanocomposite based nanofluids were measured and found to be increasing with the concentration and temperature. For the case of 0.03 vol% nanofluid, it was observed to be 1.046 W/mK at 33 degrees C. The method of ultrasound assisted was proved to be beneficial in enhancing the thermal properties of the GO-CuO nanocomposite and then the prepared nanofluids. Rheological studies of the GO-CuO nanocomposite based nanofluid proved their non-Newtonian behavior. Further, investigation on the convective heat transfer was accomplished using the GO-CuO nanocomposite based nanofluid. Heat transfer coefficient was found to be 1474.99 W/m(2)K at the exit of the flow channel for 0.03 vol% GO-CuO nanocomposite based nanofluid at Reynolds number of 940. Finally, various correlations for thermal conductivity, viscosity and Nusselt number for GO-CuO nanocomposite based nanofluid have been proposed in this work.