Numerical study of laminar convective heat transfer of nanofluids inside a circular tube

Laminar convective heat transfer of nanofluids in a circular tube under constant heat flux condition is studied numerically using a CFD approach. For this purpose, nanofluid containing polyaniline (PANI) and PANI-CuO in deionized water (basefluid) as a liquid single phase with various particle concentrations of 0.1-0.5 vol.% were used. Effects of some important parameters such as two kinds of nanofluids, nanoparticle volume fraction and inlet temperature on heat transfer coefficient have been investigated. The results showed that the predicted data were in very good agreement with experimental data. The maximum error was around 8%. Also, results have shown that heat transfer coefficient clearly increases with an increase in particle concentration and inlet temperature and decreased with increasing the axial location.

Keywords:

CFD , PANI Nanoparticles , PANI-CuO Nanocomposite , Deionized water , Nanofluids , Convective Heat Transfer Coefficient