## EFFECT OF NUMBER OF BLOCKS ON THE PERIODIC NATURAL CONVECTION INSIDE AN ENCLOSURE HEATED FROM THE SIDE
## ResumoNumerical simulation results are reported investigating the effects of placing discrete and disconnected solid
blocks inside an enclosure filled with a fluid undergoing periodic natural convection. The blocks are square,
conductive, distributed uniformly inside the enclosure in a regular "lattice" square pattern, with a fixed solidvolume
fraction – i.e., as the number of blocks inside the enclosure increases, their sizes decrease as to maintain
the same total volume of solid material. The natural convection inside the enclosure is achieved by imposing a
time-periodic and spatially uniform high temperature condition at one of the walls of the enclosure, while the other
wall is maintained at a constant, uniform and low temperature; the horizontal surfaces are set as adiabatic. The
number of blocks varies from 4 to 36, while the solid-volume fraction is kept at 36%. With this small number of
blocks, the natural convection process is modeled using the continuum-approach rather than the porous-continuum
approach for more accurate predictions. Heat transfer results are reported on a parametric form with the Prandtl
number fixed equal to 1, and the Rayleigh number inside the enclosure equal to 10 |

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