46G

AS

PIP

ELIN

E H

YD

RA

ULIC

SFigure 2.3 Moody diagram.

Rel

ativ

e ro

ughn

ess

e D

= 0.000,001

eD = 0.000,005

eD

Reynolds number Re = VDn

Fric

tion

fact

or f

0.008103 2 3 4 56 8104 2 3 4 56 8105 2 3 4 56 8106 2 3 4 56 8107 2 3 4 56 8108

0.0090.01

0.015

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.090.10

0.025

0.000,05

0.00010.0002

0.00040.00060.00080.001

0.002

0.004

0.0060.0080.01

0.0150.02

0.03

0.040.05

0.000,01

×103 ×104 ×105 ×106

Smooth pipes

Laminar flow

f = 64/R

e

LaminarFlow

CriticalZone Transition

Zone Complete turbulence, rough pipes

2785_C002.fm

Page 46 F

riday, April 1, 2005 3:23 P

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Copyright 2005 by T

aylor & Francis G

roup, LL

C