開放空間に設置した水平加熱回転円板上の共存対流熱伝達

抄録

This study describes a heat transfer characteristic on the heating rotating horizontal disk in the opened space. The heat transfer on the heating rotating disk becomes mixed convection which is affected by both buoyancy and centrifugal force. In this study, a relationship between the rotating Reynolds number and the heat transfer characteristics on the disk was investigated through three-dimensional numerical analysis. The transient change of the heat transfer was also observed. When the rotation speed becomes slower and buoyancy force becomes stronger, natural convection heat transfer becomes dominant. On the other hand, when the rotation speed becomes faster and centrifugal force becomes stronger, forced convection heat transfer becomes dominant. In these cases, we can predict the heat transfer characteristic by using the conventional formulas. However, when buoyancy force balanced with centrifugal force, the different heat transfer characteristic from both natural and forced convection conditions can be observed.