Alexandria Engineering Journal (Dec 2021)
Nano particles distribution characteristics in multi-phase heat transfer between 3D cubical enclosures mounted obstacles
Abstract
The innovation of this paper is hybrid heat transfer simulation of two different multi-phase nanofluid simultaneously between two 3D enclosures under heat flux boundary condition. This present work with arrangement of different shape of mounted obstacles effects has practical applications such as energy storage systems. Velocity and temperature fields of fluid flow are modeled based on the D3Q19, Lattice Boltzmann Method. Nanoparticle volume fraction, temperature fields, mean and local velocity in 24 cases of enclosures with 5, 7 and 9 obstacles in hot zone and 10, 14 and 18 obstacles in hot and cold zones have been investigated for arrangement rectangular, circle, vertical and horizontal ellipse obstacles. rates of mean temperature in each enclosure have been analyzed. The results presented that minimum of fluid velocity in left enclosure was in 0.4<y/L<0.5, and maximum was in 0.15<y/L<0.25 and 0.7<y/L<0.85. Also, maximum and minimum of mean temperature in left enclosure on the wall (y=0) were in enclosures with 9 rectangular obstacles in hot zones that was equal to 48.37 °C (%8.3) and 10 horizontal ellipse obstacles in hot and cold zone that was equal to 45.03 °C (%0.8), respectively.
