“…In those studies, the Reynolds number was assumed to be the independent variable and the others, such as the Nusselt's number, heat transfer coefficient, pressure drop, and friction factor, are dependents. However, since the thermophysical properties of nanofluids differ than those of water depending on the concentration of the suspended nanoparticles, analyzing the performance of a microchannel basing only on the Reynolds number is misleading [24], [27]. Therefore, another factor must be taken in consideration.…”