The thermal performance namely heat transfer charactersistics of different types of nanofluids inside a uniformly heated tube is numerically investigated. A realistic two-component model for transport phenomena in nanofluids was developed by considering nanoparticle absolute velocity as the sum of the base fluid velocity and a relative (slip) velocity. These numerical results were validated by comparing them with the experiments performed under the same flow conditions. The effect of mass flow rate, heat flux, inlet temperature, particle size, concentration on the convective heat...