Air at 20°C and a velocity of 8 m/s flows over the 4-m length of a...

Air at 20°C and a velocity of 8 m/s flows over the 4-m length of a 4-m wide single surface of a square plate whose temperature is 80°C. (For properties of air, use k = 0.02735 W/m·K, Pr = 0.7228, ν = 1.798 x 10-5 m2 /s ) Given the above information, do the calculations to answer the two MC questions below. Please clearly show/discuss your solution method and calculations. A. __________The rate of heat transfer, Q̇ , from this surface is most nearly: a) 7380 W b) 8980 W c) 11,200 W d) 14,500 W e) 20,400 W

B. _______The length of the surface for which the flow is likely to remain laminar is most nearly: a) 0.9 m b) 1.1 m c) 1.3 m d) 2.5 m e) 3.7m

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Ally Wells answered 7 months ago

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