Environmental Engineering Reference
In-Depth Information
Nomenclature
Variables
A
c,a,w
Area; channel, air, water
a
Face area vector
B
Breakup ratio
C
ε
1
Turbulence production coef
cient
C
ε
2
Dissipate coefficient
C
ε
3
Buoyancy coef
cient
D
h
Hydraulic diameter
4A
c
/Y
≡
D
ω
SST k-
ˉ
cross-derivative term
F
1
Blending function
f
b
Vortex-stretching modi
cation coef
cient
f
b
Dissipate vortex-stretching modi
cation coef
cient
f
c
Curvature correction factor
G
k
Turbulence production
G
nl
Nonlinear turbulent production
G
b
Turbulent production due to buoyancy
G
ˉ
Production of speci
c dissipation rate
g
Gravity
h
Height of liquid body
K
Temperature in Kelvin
k
Turbulent kinetic energy
k
0
Ambient turbulent kinetic energy
m
Mass
P
Pressure
Q
Volumetric
fl
ow rate
p
′
Turbulent pressure
fl
fluctuation
Re
Reynolds number
ˁ
vD
h
/
ʼ
S
Strain rate parameter
S
Strain rate tensor
T
Temperature
t
Time
u
Time-averaged mean velocity
u
0
Turbulent
fl
fluctuating velocity component in Reynolds Stress Model
v, V
General velocity expression
ʽ
Kinematic viscosity
V
Volume integral vector
v
g
Grid velocity
2
l/
We
Weber number
ˁ
v
˃
x
Mass
fl
flow-rate fraction
Y
Channel width
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