This study is to analyze the local convective heat transfer for a circular cylinder with annular fins. The correlation between wall heat transfer and three-dimensional flow is investigated for different distances of annular fins. Depending on the fin ...
This study is to analyze the local convective heat transfer for a circular cylinder with annular fins. The correlation between wall heat transfer and three-dimensional flow is investigated for different distances of annular fins. Depending on the fin distance, the flow structure is strongly changed by the variation of horseshoe vortices. Also, the vortical structures are coupled with the heat transfer. For the selected cases, the heat transfer rates are enhanced by the adoption of annular fins. As the Reynolds nunber increases, the heat transfer rate is maximized at a certain condition. These phenomena are discussed with the development of horseshoe vortices.