Environmental Engineering Reference
In-Depth Information
Pe=
0
Pe = 0.0625
Pe = 0.125
Pe = 0.25
Pe = 0.5
Pe=
1
Pe=2
Pe=4
Pe=8
Pe=16
1
0.95
0.9
0.85
0.8
0.75
0.7
0.65
0
0.2
0.4
0.6
0.8
1
x/L [-]
Fig. 5.6
Profiles for fluid phase concentration in case of transport with constant parameters for
second Damk
ohler number
Da
2
¼
1 in dependence of the
Pe
€
Figure
5.6
represents the solutions for increasing advection if the relation
between diffusion and decay remains equal. For this plot it is assumed that both
processes are equally important, which is expressed by the second Damkohler
number
Da
2
¼
1. With increasing P´clet number advection becomes more rele-
vant, the front can penetrate further, and the concentration gradients become less
steep.
The corresponding M-file
'analtrans_s4'
is included in the accompanying
software.
