Turbulent convective heat transfer of nanofluids through a square channel

This paper reports the results of experimental investigation on the heat transfer performance of Al 2 O 3 /H 2 O and TiO 2 /H 2 O nanofluids through square channel with constant wall temperature boundary condition. The flow regime through channel is turbulent. The nanofluids used in this research are Al 2 O 3 /H 2 O and TiO 2 /H 2 O with different nanoparticle concentrations. Based on the results of the present investigation, for specific Peclet number, convective heat transfer coefficient and Nusselt number of nanofluids are higher than those of distilled water. The enhancement increases with increasing nanoparticle concentration. The results also reveal that the convective heat transfer coefficient for Al 2 O 3 /H 2 O nanofluid is relatively the same as that of TiO 2 /H 2 O nanofluid.