Laminar aiding combined convection in the developing region of inclined cylinder

الملخص EN

The influence of natural convection due to buoyancy on the laminar upwards air flow in a uniformly heated inclined circular cylinder has been experimentally studied.

The investigation covered a wide range of Reynolds number (450 ≤ Re ≤ 2008), heat flux (95 ≤ q ≤ 898) W / m2, Rayligh number (1.1132 × 105 Ra £ 3.6982 × 105), with different angles of cylinder inclination α = 0° (Horizontal), α = 30°, α = 60° (Inclined) and α=90° (Vertical).Results show that the heat transfer process improves as the angle of inclination moves from vertical to horizontal position.

A general empirical equation for average Nusselt number Num as a function of Rayligh number Ra, Reynolds number Re and angle of inclination α was obtained.