Chapter 1: INTRODUCTION
M
a
potential temperature gradient
T
a
, (c) dissipation rate of the turbulent
kinetic
energy
3
/ a
z u
H
I N H ,
and
(d)
turbulent
eddy
coefficient
/
KM
M
a
K
u z
I
N
expressed as a function of stability parameter ] . The vertical dashed
lines represent the logarithmic-layer regime.
The mixing coefficients for momentum and temperature are defined as
/ /
M
K
uw u z
c c
w w and
'/ /
T
K
w
z
c
4 w4 w , respectively, and can be
defined via the universal functions as follows:
1
KM
M
I
I
,
1
KT
T
I
I
,
(1.155)
where
/
K
M
a
K
u z
I
N ,
/
KT
T
a
K
T z
I
N .
(1.156)
Several universal functions from the Monin-Oboukhov theory are shown
in Figure 1-17. There are three asymptotic regimes in this theory:
61
u wz , (b)
w /
Figure 1-17. Universal functions for dimensionless (a) shear I
N u
z
I
N
w
z /
/
U
4 wz
/