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Problem 2 The air flows through a small diameter steel pipe. Show how the convective heat transfer coefficient for the fully developed flow of the
Problem 2 The air flows through a small diameter steel pipe. Show how the convective heat transfer coefficient for the fully developed flow of the air in the microchannel and the constant pipe surface heat flux varies with pipe diameter laying in the range 1um sd Simm. Evaluate the the air properties at T = 75 C and the atmospheric pressure. Assume that thermal and momentum accommodation coefficients are a, = 0.92 and am = 0.87, respectively. Compare the results with the convective heat transfer coefficient for the large pipe diamters
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