(i)
Fig. 1. Schematic diagrams of the heat sink models : (a) square (84 fins, height =16 mm), (b) square (84 fins, height = 10 mm), (c) square ( 45 fins, height = 16 mm), (d) triangular (84 fins, height = 16 mm), (e) triangular (84 fins, height = 10 mm), (f) triangular (45 fins, height = 16 mm), (g) circular (84 fins, height = 16 mm), (h) circular (84 fins, height = 10 mm), (i) circular (45 fins, height = 16 mm)