Environmental Engineering Reference
In-Depth Information
1
0.9
Da
1
=16
0.8
Da
1
=8
Da
1
=4
Da
1
=2
0.7
0.6
Da
1
=1
Da
1
= 0.5
0.5
0.4
Da
1
= 0.
2
5
Da
1
= 0.125
0.3
0.2
0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
x/L [-]
Fig. 5.5
Profiles for fluid phase concentration in case of transport with constant parameters for
Pe ¼
1 in dependence of the first Damkohler number
Da
1
their relative importance. For high values of the Damk
ohler number decay is
relatively important and thus concentrations are significantly reduced from the
inlet (
x ¼
€
0) to the outlet (
x ¼ L
). With decreasing value for
Da
1
, decay becomes
less relevant. Then the profile for advection and diffusion is approached, which is
the straight line representing constant concentration
c ¼ c
0
(for the given boundary
conditions). The figure is produced in MATLAB
by the following commands:
®
The corresponding M-file
'analtrans_s3'
is included in the accompanying
software.