Turbulent Convective Heat Transfer of Very Dilute Nanofluids Inside a Circular Tube

Turbulent convective heat transfer and pressure drop of •-Al₂O₃/water and CuO/Water nanofluid inside a circular tube were experimentally investigated and compared. The nanofluids were very dilute. Results indicated that addition of small amounts of nanoparticles to the base fluid augmented heat transfer. Measurements showed that pressure drop for the dilute nanofluid was much greater than that of the base fluid. Experimental results were compared with existing correlations for nanofluid convective heat transfer coefficient in turbulent regime.