Abstract
Numerical simulations have been conducted to explore thermally and hyarodynamicallv developing forced convective heat transfer or nanofluids in a circular tube subject to a uniform wall heat flux. From the results, it has been concluded that, for certain cases of both alumina-water nanofluids and titania-water nanofluids, the anomalous heat transfer enhancement (i.e. the heat transfer enhancement exceeding the rate expected from the increase in thermal conductivity) is possible in most part of the entrance region except the region close to the leading edge.
