ABSTRAKT

Benchmark computations are reported of natural convection of air (Pr=0.71) for a range of Rayleigh numbers (10⁵≤ Ra ≤10⁸), in a cubical cavity at three angles of inclination (φ = 0, 45, 90°), with two opposite walls at constant temperatures T_c and T_h, and the four remaining walls having linear temperature variation from T_h to T_c. The computations were performed using a finite volume transient method on a high-resolution non-uniform grid (82³), with central differencing scheme (CDS) for the spatial, and an implicit three-level scheme (ITLS) for the time integration. The results are in good agreement with the reference experimental measurements.