Moody Diagram - Lecture notes 1-12 PDF

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Summary

Moody Diagram used for problems in Fluid Mechanics ...

Description

3.5 3

Laminar flow

Critical zone

Transition zone

Complete turbulence, rough pipes, R > 3500/r

2.5

2 1.8

0.05

1.6

__

0.04

__

2 0 Fanning friction factor f = −−−−2 V

__

10

__

0.015

−2

9

0.01 0.008

f = 16/Re

8

0.006

7

0.004

6

0.002

5.5 5

0.001 0.0008 0.0006

4.5

Smooth pipes, = 0 1/ f = 4 log(R f ) − 0.4

4 3.5 3 2.5

2 1.8 1.6 1.4

Material −−−−−−−−−−−−−−− Riveted steel Concrete Wood stave Cast iron Galvanized iron Asphalted cast iron Commercial steel Drawn tubing

0.0004 0.0002 0.0001

(mm) −−−−−−−−−−− 0.9−9 0.3−3 0.18−0.9 0.25 0.15 0.12 0.046 0.0015

5e−05 2e−05 1e−05 5e−06 1e−06

1.2

10

−3

6 7 8

10

3

2

3

4

5 6 7 8

10

4

2

3

4

5 6 7 8

10

5

2

3

4

5 6 7 8

VD Reynolds number Re = −−−−

6

10

2

3

4

5 6 7 8

10

7

2

3

4

5 6 7 8

10

Adapted by CN from Metzger & Willard, Inc.

8

Relative roughness

0.02

1.2

k = −−−− D

0.03

1.4...