Shear Velocity, u, (m/sec) 
Pre-transition 
Jtn Wu 
Turbulent boundary layer 
Aerodynamically rough flow 
turbulent ) 
Transition 
Surface roughness governed 
by capillary waves 
Surface roughness governed 
by gravity waves 
— 
< 
D 
> 
° 
pad 
' 
<= 
_ 
° 
° 
[= 
7) 
~— 
Cc 
fe) 
= 
“a 
Cc 
Oo 
-_ 
— 
_ Transition 
1/2 
9.0295. - U_ - Turbulent aerodynamically smooth flow 
iri fc) 
6.332 V2 f 
Se U - Laminar flow 
iRi/2 ° 
| 
5 19 
Wind Velocity, Us (m/sec ) 
FIGURE 5 - WIND-SHEAR VELOCITY AND BOUNDARY-LAYER REGIMES 
1464 
