Heat transfer in non-Newtonian nanofluids represents a cutting-edge area of research in thermal engineering, combining the complex rheological properties of non-Newtonian fluids with the enhanced thermal characteristics of nanofluids. The current study`s ultimate goal is to validate a valid reference paper entitled “ Modeling of forced convective heat transfer of a non-Newtonian nanofluid in the horizontal tube under constant heat flux with computational fluid dynamics” that focuses on non-Newtonian nanofluids containing Al2O3 and Xanthan aqueous solution. Notably, the reference paper is published in the International Communication of Heat and Mass Transfer journal.

Figure 1: Variation of heat transfer coefficient with Re

Simulation Process

The Herschel–Bulkley model approximates the rheological behavior of viscous non-Newtonian liquids with a yield stress. This paper adopts a single-phase approach to model a combination of nanoparticles with non-newtonian fluid. Thus, an approximation of the preliminary steps is provided to calculate the thermal properties of the fluid. This simulation features a structured grid that rockets data quality.

Figure 2: Schematic of pipe domain

Post-processing

Given the target of our study, this report does not represent the analysis of temperature and velocity contours. They are all thoroughly explained in the reference paper. As illustrated in Figure 1, the solution’s heat transfer coefficient when Reynolds is 900 is about 1710 w/m2.K. Whereas the current CFD solution gives us a value of 1733 W/m2.K. This slight error is entirely acceptable and shows the precision of our study. The Numerical reference paper results are validated.