In a manufacturing process, a long, coated plastic
Chapter 7, Problem 7.71(choose chapter or problem)
In a manufacturing process, a long, coated plastic rod(??2200 kg/m3, c?800 J/kg?K, k?1W/m?K) ofdiameter D?20 mm is initially at a uniform tempera-ture of 25?C and is suddenly exposed to a cross flow ofair at T??350?C and V?50 m/s.(a) How long will it take for the surface of the rod toreach 175?C, the temperature above which thespecial coating will cure?(b) Generate a plot of the time to reach 175?C as afunction of air velocity for 5V50 m/s
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