Research on nanofluid turbulent forced convection has delved deeply into the fluid dynamics properties and improved thermal performance of nanofluids in turbulent flow scenarios. These studies show that because of the modified flow dynamics and enhanced thermal conductivity of nanoparticles, adding them to a base fluid greatly increases heat transfer rates. Based on the experimental data given in the paper entitled “ Comparative assessment of single and two-phase models for numerical studies of nanofluid turbulent forced convection”, a CFD simulation is executed to validate it.

Simulation Process

The heated pipe geometry is designed without any significant complexity based on geometrical specifications given in the paper. It then meshed using ICEM, generating structured grid. Through comparison with two distinct sets of experimental data, the numerical predictions made by three different two-phase models (volume of fluid, mixture, and Eulerian) of nanofluid turbulent forced convection in a horizontal tube with uniform wall heat flux are assessed. After all, Mixture multiphase model offers perfectly accurate results.

Post-processing

Firstly, Nusselt number for different cases are plotted in Figure 3 of the reference paper. By a wholistic view, it is showing a better accuracy for single-phase approach compared to the two-phase approach. It is utterly unacceptable and doesn`t make any sense. This is why, friction coefficient is selected for making a proper comparison, shown in Figure 5. CFD Simulation reports 0.033 while the reference paper shows a value of 0.032 at Re=10000. It means a perfect agreement between the experimental data and the present CFD simulation.