Youve experienced convection cooling if youve ever
Chapter , Problem 1.18(choose chapter or problem)
Youve experienced convection cooling if youve ever extended your hand out the window of a moving vehicle or into a flowing water stream. With the surface of your hand at a temperature of 30 C, determine the convection heat flux for (a) a vehicle speed of 35 km/h in air at 5 C with a convection coefficient of 40 W/m2 K and (b) a velocity of 0.2 m/s in a water stream at 10C with a convection coefficient of 900 W/m2 K. Which condition would feel colder? Contrast these results with a heat loss of approximately 30 W/m2 under normal room conditions.
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