Cooling a Steel Ball: Forced Convection Example
Автор: Coach Jones
Загружено: 2025-10-26
Просмотров: 28
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This is an example of cooling a sphere using external forced convection
A 25-cm-diameter stainless steel ball (ρp=8055 kg/m3, cp=480) is removed from the oven at a uniform temperature of 300∘C (Fig. 7–24). The ball is then subjected to the flow of air at 1 atm pressure and 25∘C with a velocity of 3 m/s. The surface temperature of the ball eventually drops to 200∘C. Determine the average convection heat transfer coefficient during this cooling process and estimate how long the process will take.
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