Heat transfer enhancement utilizing hybrid nanofluid impinging jet over a set of heated sources

Abstract

In this paper, conjugate heat transfer in turbulent flow horizontal combined with slot jet impinging on several hot sources utilizing hybrid nanofluid has been analyzed numerically using k-w SST with low-Re correction turbulence model. In the current study the governing equations were solved by employing Ansys Fluent 14.5 program. Several variables such as streamline, isotherm contours, average Nusselt number (Nu) are analyzed for multiple Reynolds number ratio (α), nanoparticle volume fraction (φhnf) and position of the slot jet. The steady, turbulent, forced convection, incompressible, and Newtonian flows were chosen to analyze the flow and heat transfer properties. The findings concluded that the heat transfer rate was enhanced by raising the α and φhnf. The addition of an impinging jet to the higher wall of the channel containing the hot sources significantly enhances heat transfer rate, specifically when the impinging jet is located on the first source. A comparison between mono nanofluid and hybrid nanofluid was performed. Results indicated that hybrid nanofluid with 30 % CNT (Carbone nanotube) of the nanoparticles’ total volume fraction improves the heat transfer rate better than mono nanofluid. A strong consensus has been reached with the experimental findings available in the literature.