Table 1:
Theoretical diffusion times to obtain 90% average methane concentration in the core of HC-PCF fibres for different lengths.
One open end
Two open ends
ℓ
(m)
t
(s)
t
(min)
t
(s)
t
(min)
0.02
16
0.27
4
0.07
0.06
136
2.27
34
0.57
0.18
1220
20.33
305
5.08
0.54
10980
183
2745
45.75