Abstract
This study applied an incompressible version of the smoothed particle hydrodynamics (SPH) method for simulating a sloshing circular cylinder during natural convection flow over a T-shaped fin in an enclosure occupied by Al2O3 nanofluid. The center area of the enclosure is saturated with a heterogeneous porous medium. Variations in the thermal conditions of the embedded circular cylinder and T-shaped fin were considered. Vertical sloshing of the circular cylinder under a resonance sway excitation was carried out for different values of amplitudes and frequencies. The embedded circular cylinder and T-shaped fin inside the enclosure are maintained at a high temperature T-h. The side walls of the enclosure are maintained at a low temperature T-c, and the horizontal walls are adiabatic. The ranges of key physical parameters are T-shaped fin length (0.25 <= L-T <= 1), circular cylinder radius (0.1 <= R-c <= 0.4), Rayleigh number (10(3) <= Ra <= 10(6)), Darcy parameter (10(-3) <= Da <= 10(-5)), solid volume fraction (0 <= phi <= 0.05), wave amplitude (0.1 <= A <= 0.6), and resonance frequency (1 <= omega <= 10). The simulations revealed that an increment on T-shaped fin length augments the temperature distributions and flow velocity in the enclosure. The circular cylinder radius rises the temperature distributions in the enclosure. At a lower Darcy parameter, the horizontal heterogeneous porous medium in the center area of the enclosure is impeding the nanofluid flow. The hot circular cylinder gives the highest values of the fluid velocity and temperature distributions inside the enclosure.