Chapter 6, Problem 6.6P

A flat plate is of planar dimension $1\text{m}\times 0.75\text{m}.$ For parallel laminar flow over the plate, calculate the ratio of the average heat transfer coefficients over the entire plate, ${\bar{h}}_{L,1}/{\bar{h}}_{L,2},$ for two cases. In Case 1, flow is in the short direction $\left(L=0.75\text{m}\right);$ in Case 2, flow is in the long direction $\left(L=1\text{m}\right).$ Which orientation will result in the larger heat transfer rate? See Problem 6.5.