Abstract
Experimental investigation have been performed on natural convection of air over an upward facing, inclined, heated plate. The special interests were paid to the turbulent transition and the heat transfer characteristics. The flow field over the plate was visualized with smoke. The results showed that the longitudinal vortices appear over the plate when the inclination angle θ<72° from horizontal, and they become a trigger to the turbulent transition. The local heat transfer coefficients were also measured with the angles 0°<θ<90°. The results showed that the local Nusselt numbers of the laminar flow depend on the inclination angles, while those of the turbulent flow are consistent with the angles.
