Chapt06

It was plotted in 1944 by moody 8 into what is now

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Unformatted text preview: for f if Red is known, although it easily yields to the EES Equation Solver. An alternate explicit formula given by Haaland [33] as 1 f 1/2 1.8 log 6.9 Red /d 3.7 1.11 (6.64a) | v v varies less than 2 percent from Eq. (6.64). The shaded area in the Moody chart indicates the range where transition from laminar to turbulent flow occurs. There are no reliable friction factors in this range, 2000 Red 4000. Notice that the roughness curves are nearly horizontal in the fully rough regime to the right of the dashed line. From tests with commercial pipes, recommended values for average pipe roughness are listed in Table 6.1. | e-Text Main Menu | Textbook Table of Contents | Study Guide Values of (Vd) for water at 60°F (velocity, ft/s 0.1 0.2 0.4 0.6 0.8 1 2 4 6 8 10 20 40 60 × diameter, in) 80 100 200 400 600 800 1000 Values of (Vd) for atmospheric air at 60°F 2 0.10 4 6 8 10 20 40 Laminar Critical flow zone Transition zone 0.09 0.08 60 100 200 400 600 800 1000 2000 4000 8000 6000 10,000 2000 20,000 4000 8000 6000 10,000...
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