Numerical study of turbulent flow in horizontal pipe nanofluid iron oxide

Abstract A variety of methods have been proposed to increase the thermal conductivity of an object. One of these methods is the use of fluids with proper heat transfer properties. Nano-fluids are considered as a new generation of fluids with thermal properties better than common fluids. In this study, thermal conductivity of the turbulent flow of iron oxide nanofluid was modeled in a long tube under constant heat flux. Basic equations are solved with boundary conditions using the finite volume method and PISO algorithm. The impacts of increasing the Reynolds number, temperature, and flow field in the tube wall and axis are investigated with the base fluid and single-phase, two-phase models and empirical equations. It was observed that by increasing the volume percentage (%volume) of iron oxide nanoparticles, outlet temperature of the tube significantly decreases. As well, the two-phase model has an acceptable agreement with experimental models

Keywords:

nanofluid iron oxide , heat transfer , turbulent flow , computational fluid dynamics