2'
21
I
a
I (
(
I
I
I
U R B I N
R U R A L
' \ \
\
-
1
I
I
I
I
.I0
.IS
.20
TURBULENCE INTENSITY (1 1
rcspcctivcl). The m a l l circles in Fig. 6 represent o u r cstinliite o f the actual
n i w n virlucs of /{ for turhulence intensities less than .12, obtained on Ihc
assumption thiit the derived rural v;ilues of {rare representative and that the
percentage change of {j (per unil increment of turbulence intensity) is 19 O o .
With this assumption. /I is indicated to vary from a mean value of 7 a t ;I
turbulence intensity of .07 to a mean value of 2 at ; i turbulence intensity of
. I 1.
I t is of intcrest to cornpiire the above relation between /I and verticsl
I urhrileticc intensit y with that derived from the simple stead y-sta te ' I car[wheel" concept of eddy structure. As shown at upper right in big. 6. i f
almosphcric cddics itre visualizcd as circular vortices moving with the mean
wind spccd. ;I particle moving itlong the pcrirneter of the vortex would have
21
I
a
I (
(
I
I
I
U R B I N
R U R A L
' \ \
\
-
1
I
I
I
I
.I0
.IS
.20
TURBULENCE INTENSITY (1 1
rcspcctivcl). The m a l l circles in Fig. 6 represent o u r cstinliite o f the actual
n i w n virlucs of /{ for turhulence intensities less than .12, obtained on Ihc
assumption thiit the derived rural v;ilues of {rare representative and that the
percentage change of {j (per unil increment of turbulence intensity) is 19 O o .
With this assumption. /I is indicated to vary from a mean value of 7 a t ;I
turbulence intensity of .07 to a mean value of 2 at ; i turbulence intensity of
. I 1.
I t is of intcrest to cornpiire the above relation between /I and verticsl
I urhrileticc intensit y with that derived from the simple stead y-sta te ' I car[wheel" concept of eddy structure. As shown at upper right in big. 6. i f
almosphcric cddics itre visualizcd as circular vortices moving with the mean
wind spccd. ;I particle moving itlong the pcrirneter of the vortex would have