Environmental Engineering Reference
In-Depth Information
H
height (in Example 3.9)
[m]
kg
−1
]
h
mass-specific enthalpy
[J
m
−2
K
−1
]
h
heat transfer coefficient
[W
h
mol
−1
]
mole-specific enthalpy
[J
I
unity matrix
[
-
]
j
!
m
−2
mass flux of species i
[kg
s]
j
!
m
−2
]
energy flux due to conduction
[W
k
i
reaction rate coefficient
Depends on rate expression
L
length
[m]
m
mass
[kg]
mol
−1
]
MW
i
molecular weight of species i
[kg
n
i
number of moles of species i
[mol]
p
pressure
[Pa]
Q
heat supplied or extracted
[J]
Q
heat flow supplied or extracted
[W]
m
−3
s
−1
]
R
i
(net) rate of production of species i
[mol
mol
−1
K
−1
]
R
u
universal gas constant
[J
r
radius
[m]
m
−3
s
−1
]
r
reaction rate
[mol
s
f
source term for
f
[
-
]
T
temperature
[K]
t
time
[s]
U
internal energy
[J]
kg
−1
]
u
mass-specific internal energy
[J
s
−1
]
u
velocity in 1D model (x-direction)
[m
mol
−1
]
u
mole-specific internal energy
[J
V
!
s
−1
]
diffusion velocity of species i
[m
s
−1
]
v
!
[m
velocity of species i
s
−1
]
!
[m
velocity
s
−1
]
v
velocity in 1D model (y-direction)
[m
[m
3
]
V
volume
W
work
[J]
W
power
[W]
w
width
[m]
Y
i
mass fraction of species i
[
-
]
X
i
mole fraction of species i
[
-
]
z
height in a potential field
[m]
η
i
yield of component
i
in a reaction
[
-
]
η
dynamic viscosity
[Pa
s]
ξ
degree of conversion
[
-
]
λ
air stoichiometry coefficient (combustion)
[
-
]
ν
i
stoichiometric coefficient of species i
[
-
]
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