A long cylinder of 30-mm diameter, initially at a uni-form
Chapter 5, Problem 5.61(choose chapter or problem)
A long cylinder of 30-mm diameter, initially at a uni-form temperature of 1000 K, is suddenly quenched in alarge, constant-temperature oil bath at 350 K. The cylin-der properties are k?1.7 W/m?K, c?1600 J/kg?K,and ??400 kg/m3, while the convection coefficient is50 W/m2?K.(a) Calculate the time required for the surface of thecylinder to reach 500 K.(b) Compute and plot the surface temperature historyfor 0?t?300 s. If the oil were agitated, provid-ing a convection coefficient of 250 W/m2?K, howwould the temperature history change?
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