Table 3. Regression rate constant and exponent value
r
˙
=
a
G
o
x
,
a
v
g
n
d
h
(mm)
A
p
(mm
2
)
a
n
Non-circular
15
500
0.0174
0.740
Circular
15
180
0.01
0.771
Circular
25
500
0.0178
0.628