A circular fin is made of pure copper with a thermal conductivity of k = 400 W/(m C), h = 150 W/(m 2


A spherical fin is made of undefiled copper delay a thermal conductivity of k = 400 W/(m C), h = 150 W/(m2 C), bulk blindness r = 8900 kg/m3, and unfair excitement c = 375 J/(kg C). The initial air of the fin is 25 C. The fin prolixity is 2 cm and the transection is 0.4 cm. The exact tip of the fin is insulated. See Figure P16–18. The deep of the fin is then suddenly increased to a air of 85 C and maintained at this temperature. Use the lumped constitute of the capacitance matrix, a era plod of 0.1 s, and b =2 3. Use two elements of similar prolixity. Determine the air distribution up to 3 s. Compare your results delay Example 16.7, which used the consistent constitute of the capacitance matrix.