Effects of Heat Dissipation Fin Shape on Heat Dissipation Performance of UCD Lamp

In this study, the effects of the aspect ratio and radius of the heat dissipation fin on the heat dissipation performance of a UCD lamp were analyzed using an analytical method. The minimum grid size and number of meshes of the fin used for numerical analysis were 0.02 mm and 11,000, respectively. The heat transfer area of the fin was kept constant at 4 mm(2). The aspect ratios of the fin were 1.0 (base model), 1.8, 1.41, 0.56, and 0.29, and the respective radii of the fin were R=0.0 mm, 0.3 mm, 0.6 mm, 0.9 mm, and 1.2 mm. The heat flux and heat flux time applied to the fin were 1x105 W/m(2) and 0.1 s, 0.2 s, 0.5 s, 1 s, 2 s, 5 s, and 10 s, respectively. The heat dissipation performance of the UCD lamp was the best when the aspect ratio and radius of the fin were 1.8 and 1.2 mm, respectively, and showed an increase of 5.7% from the base model.