Mathematical Model for Turbulent Forced Convective Heat Transfer and Friction Factor of Magnetic Nanofluid (Fe3O4/Water Nanofluid) in a Circular Tube

In this study the nanofluid used was a stable colloidal suspension of magnetic (Fe3O4) nanoparticles ofaverage diameter 32 nm. The convective heat transfer coefficient and friction factor characteristics of Fe3O4 nanofluidfor flow in a horizontal circular tube is evaluated mathematically in the range of 3000 < Re < 22000 and the nanoparticlesvolume concentration range of 0 < φ < 0.6%. The results of this study show that the Nusselt number increased withincreasing the Reynolds number and volume concentration of nanoparticles and the friction factor increased withdecreasing the Reynolds number.

کلیدواژه ها:

Convective heat transfer ، Friction factor ، Magnetic nanofluid ، Reynolds number