Variation of the local heat transfer coefficient

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Reference no: EM13946703

1. Consider water at 27°C in parallel flow over an isother- mal, 1-m-long flat plate with a velocity of 2 m/s.

(a) Plot the variation of the local heat transfer coefficient, hx(x), with distance along the plate for three flow conditions corresponding to transition Reynolds numbers of (i) 5 X 105, (ii) 3 X 105, and (iii) 0 (the flow is fully turbulent).

(b) Plot the variation of the average heat transfer coef- ficient hx(x) with distance for the three flow condi- tions of part (a).

2. Explain under what conditions the total rate of heat transfer from an isothermal flat plate of dimensions L X 2L would be the same, independent of whether parallel flow over the plate is directed along the side of length L or 2L. With a critical Reynolds number of 5 X 105, for what values of ReL would the total heat transfer be independent of orientation?

Reference no: EM13946703

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