Forced convection from a sphere in creeping flow, a sphere o
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Forced convection from a sphere in creeping flow, a sphere of diameter D, whose surface is maintained at a temperature T
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Forced convection from a sphere in creeping flow, a sphere of diameter D, whose surface is maintained at a temperature T0, is located in a fluid stream approaching with a velocity v8 and temperature T = o. The flow around the sphere is in the "creeping flow" regime--that is, with the Reynolds number less than about 0.1. The heat loss from the sphere is described by Eq. 12.4-34. (a) Verify that the equation is dimensionally correct. (b) Estimate the rate of heat transfer, Q, for the flow around a sphere of diameter 1 min. The fluid is an oil at T8 = 50Â°C moving at a velocity 1.0 cm/sec with respect to the sphere, the surface of which is at a temperature of 100Â°C. The oil has the following properties: p = 0.9 g/cm3, Cp = 0.45 cal/g Â· K, k = 3.0 x 10-4 cal/s Â· cm Â· K and Âµ = 150 cp.
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