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Q n + 1
i
A n + 1
i
Q i
A i +
Q i B i
(
1
A i δ
=
Q i
2 δ
h i
(5.65)
A i )
Q n + 1
i
A n + 1
i
2
Q i
A i
2
2 Q i
(
Q i )
2 B i
2
(
=
+
2 δ
Q i
3 δ
h i
(5.66)
A i )
A i )
(
β n + 1
i
= β
i
(5.67)
Substituting Eqs. (5.61)-(5.67) into the discretized momentum equation (5.56)
yields the locally linearized form:
a i δ
b i δ
c i δ
d i δ
p i
h i
+
Q i
+
h i + 1
+
Q i + 1
=
(5.68)
where
S f , i
K i
Q i B i
(
x β
Q i )
2 B i
1
ψ
+ θ
(
θ
g
K
a i =−
i
x
2
θ(
1
ψ
)
g
;
R
A i )
A i )
t
2
(
3
z s
i
x β i Q i
Q i |
1
ψ
A i θ
1
g |
b i =
+
2
θ(
1
ψ
)
2 ;
R
A i )
K i )
t
(
2
(
S f , i + 1
K i + 1
Q i + 1 B i + 1
(
x β
Q i + 1 )
2 B i + 1
(
c i =− ψ
θ
+ θ
g
K
i
+
1
x
2
θψ
R g
;
A i + 1 )
A i + 1 )
2
3
t
(
z s
+
i
1
x β
1 Q i + 1
Q i + 1 |
R g |
d i = ψ
A i + 1 + θ
1
i
+
+
2
θψ
2 ; and
A i + 1 )
K i + 1 )
2
t
(
(
Q i + 1
A i + 1
Q i
Q i + 1
A i + 1
Q i
A i
p i =− ψ
1
ψ
A i
t
t
β
2
Q i + 1
A i + 1
2
Q i
A i
β
θ
i
+
1
i
2
x
2
β n
2
Q i + 1
A i + 1
2
Q i
A i
β n
1
θ
i
+
1
i
2
x
2
θ
g
z s , i ) (
1
θ)
g
z s , i + 1
z s , i + 1
z s , i )
x (
(
x
R S f , i + 1 + (
S f , i ]
θ
g
[ ψ
1
ψ
)
R
R S f , i + 1 + (
S f , i ]
(
1
θ)
g
[ ψ
1
ψ
)
R
 
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