Effect of Thermophoresis, Brownian and Turbulent Mass Fluxes in the Simulation of Two Phase Turbulent Free Convection of Nanofluid Inside the Enclosure using v2-f Model

Document Type : Research Article

Author

department of renewable energy, faculty of mechanical engineering, urmia university of technology

10.22060/ajme.2020.16761.5832

Abstract

In this article, two-phase alumina-water turbulent natural convection with Reynolds Averaged Navier-Stokes (RANS) based v2-f model in a square cavity has been investigated. Buongiorno’s two-phase model is modified for considering the nanoparticles diffusion via turbulent flow eddies. Using the finite volume method and the SIMPLE algorithm, the governing equations along with boundary conditions have been discretized. The left and right vertical walls of cavity are kept at constant temperatures Th and Tc, respectively, while the other walls are thermally insulated. Calculations are performed for high Rayleigh numbers (Ra= 107–109) and average volume fractions of nanoparticles (0

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