Discuss teh below:
Q: Experimental measurements of the convection heat transfer coefficient for a square bar in cross flow yielded the following values:
h1=50W/m2.K when V1=20m/s
h2=40 W/m2.K when V2=15 m/s
Assume that the functional form of the Nusselt number is Nu = C Rem Prn, where C, m, and n are constants.
(a) What will 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?
