Solve Prob. 8.110 numerically for a rectangular duct of side length b by 2b, using at least 100 nodal points. Evaluate the volume flow rate and the friction factor, and compare with the results in Table 6.4: where Dh = 4A/P = 4b/3 for this case. Comment on the possible truncation errors of your model.

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00143_dp PfReD, 62.19 i-1 i=6 i= 11