Experimental measurements of the convection heat transfer coefficient for a square bar in cross flow yielded the following values:

Assume that the functional form of the Nusselt number is Nu = C Rem Prn, where C, m, and n are constants.

(a) What wi11 be the convection heat transfer coefficient for a similar bar with L = 1 m when V = 15 m/s?

(b) What will be the convection heat transfer coefficient for a similar bar with L = 1 m when V = 30 ms?

(c) Would your results be the same if the side of the bar, rather than its diagonal, were used as the characteristic length?

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V, = 20 m/s V2 = 15 m/s h, = 50 W/m2 K hz = 40 W/m? · K when when L = 0.5 m Air