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A solid steel sphere AISI 1010 300 mm in diameter is coated with a dielectric material layer of thickness 2 mm and thermal conductivity 004 Wm K The coated sphere is initially at a uniform

A solid steel sphere (AISI 1010), 300 mm in diameter, is coated with a dielectric material layer of thickness 2 mm and thermal conductivity 0.04 W/m∙ K. The coated sphere is initially at a uniform temperature of 500°C and is suddenly quenched in a large oil bath for which T = 100°C and h 3300 W/m2 ∙ K. Estimate the time required for the coated sphere temperature to reach 140°C.

 

Jun 27 2020 View more View Less

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