A long, highly polished aluminum rod of diameter D = 35 mm is hung horizontally in a

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A long, highly polished aluminum rod of diameter D = 35 mm is hung horizontally in a large room. The initial rod temperature is T= 90°C, and the room air is T∞ = 20°C. At time t1 = 1250 s, the rod temperature is T= 65°C, and, at time t= 6700s, the rod temperature is T2 = 30°C. Determine the values of the constants C and n that appear in Equation 5.26. Plot the rod temperature versus time for 0 ≤ t ≤ 10,000 s. On the same graph, plot the rod temperature versus time for a constant value of the convection heat transfer coefficient, evaluated at a rod temperature of T = (T+ T)/2. For all cases, evaluate properties T = (T + T)/2.

h = C(T – T∞)n

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Fundamentals Of Heat And Mass Transfer

ISBN: 9780470501979

7th Edition

Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt

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