Repeat Prob. 4107 with the heat transfer coefficient at the top and the bottom surfaces of each
Question:
Repeat Prob. 4–107 with the heat transfer coefficient at the top and the bottom surfaces of each block being doubled to 80 W/m2·K.
Data From Problem 107
Consider a cubic block whose sides are 5 cm long and a cylindrical block whose height and diameter are also 5 cm. Both blocks are initially at 20°C and are made of granite (k = 2.5 W/m · K and α = 1.15 × 10-6 m2/s). Now both blocks are exposed to hot gases at 500°C in a furnace on all of their surfaces with a heat transfer coefficient of 40 W/m2 · K. Determine the center temperature of each geometry after 10, 20, and 60 min.
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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