A hot brass plate is having its upper surface cooled by an impinging jet of air at a temperature of 15C and a convection heat transfer coefficient of 220 W m2K The 10 cm thick brass plate ( 8530 kg m3, cp 380 J kgK, k 110 W mK, and 33 9 106 m2 s) has a uniform initial temperature of 650C, and the bottom surface of the plate is insulated Determine the temperature at the center plane of the brass plate after 3 minutes of cooling Air, 15C h 220 W m K L 10 cm Brass slab Insulation FIGURE P4 42

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Question: A hot brass plate is having its upper surface cooled by an impinging jet of air at a temperature of 15C and a convection heat

A hot brass plate is having its upper surface cooled by an impinging jet of air at a temperature of 15°C and a convection heat transfer coefficient of 220 W/m2·K. The 10-cm thick brass plate (ρ = 8530 kg/m3, cp = 380 J/kg·K, k=110 W/m·K, and α = 33.9 × 10–6 m2/s) has a uniform initial temperature of 650°C, and the bottom surface of the plate is insulated. Determine the temperature at the center plane of the brass plate after 3 minutes of cooling.

Air, 15C h = 220 W/m K L= 10 cm Brass slab

Air, 15C h = 220 W/m K L= 10 cm Brass slab Insulation FIGURE P4-42

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