18-51 A long 35-cm-diameter cylindrical shaft made of stainless steel 304 (k = 14.9 W/mK, p = 7900 kg/m³, cp = 477 J/kg . K. and a = 3.95 x 10-6 m²/s) comes out of an oven at a uniform temperature of 500°C. The shaft is then allowed to cool slowly in a chamber at 150°C with an average convection heat transfer coefficient of h=60W/m² K Determine the temperature at the center of the shaft 20 min after the start of the cooling process. Also, determine the heat transfer per unit length of the shaft during this time period. Solve this problem using the analytical one-term approximation method Answers: 486°C 22.270 kl
18-51 A long 35-cm-diameter cylindrical shaft made of stainless steel 304 (k = 14.9 W/mK, p = 7900 kg/m³, cp = 477 J/kg . K. and a = 3.95 x 10-6 m²/s) comes out of an oven at a uniform temperature of 500°C. The shaft is then allowed to cool slowly in a chamber at 150°C with an average convection heat transfer coefficient of h=60W/m² K Determine the temperature at the center of the shaft 20 min after the start of the cooling process. Also, determine the heat transfer per unit length of the shaft during this time period. Solve this problem using the analytical one-term approximation method Answers: 486°C 22.270 kl
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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