Addendum
CIRAS-2 Operator's Manual Version 2.04
- 164 -
When N = 0 or 1 then this equals -RB. This follows from the fact that with transpiration on one side only,
the boundary layer resistance to subtract is 2*RB, whereas the original calculation has subtracted only RB.
Substituting in equation (5) for E/D from equation (4)
RB
eq
RS
D
E
ie
)
(
1
:
RB
eq
RS
N
N
RB
N
N
eq
RS
true
RS
)
(
1
*
25
.
0
25
.
0
1
*
)
(
)
(
(6)
Magnitude of Errors in RS
We can determine the magnitude of the error for various values of RS, RB and N.
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0
10
20
30
40
50
60
% Distribution
E
rr
o
r
in
R
S
m
2
s
m
o
l
-1
RS = 1
RS = 12
1.
R
B
= 0.45 m
2
s mol
-1
2.
R
B
= 0.3 m
2
s mol
-1
3.
R
B
= 0.15 m
2
s mol
-1
1
2
3