Simulation of Convective Heat Transfer of a Nanofluid in a Circular Cross-section

The CFD simulation of heat transfer characteristics of a nanofluid in a circular pipe under convective heat transfer was considered using the fluent software (version 6.3.26) in the laminar flow. Al2O3 nanoparticlesin water with concentrations of 0.5, 1.0, 1.5, 2 and 2.5% were studied in the simulation. Allthermo-physical properties of nanofluids were temperature independent. It was concluded that heat transfer coefficient increased with the Peclet number. Furthermore, the effect of nano-particles concentration on the convective heat transfer coefficient was theoretically investigated and the resultswere compared with the experimental data obtained from the literature. The maximum convective heat transfer coefficient was observed at the highest concentration of nano-particles in water (2.5%). The simulated data were in good agreement with the literature (with the discrepancy of less than 10%).

کلیدواژه ها:

Nanofluid ، Heat Transfer ، Simulation ، Circular Tube