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6.4 Applications of the Proposed Decoupling Procedure 135

oxidised (Matthai et al. 1995, Cox et al. 1995). This is, in fact, a special example of
parallel-flow geometry except that now the new fluid source is embedded within the
primary flow stream. We refer to this process as parallel flow geometry of the second
kind. The third end member involves injection of one fluid perpendicular to the flow
field of a second fluid as shown in Figs. 6.6d, e. This mixing geometry produces
a mixing plume that expands outwards mainly in the downstream direction of the

High Permeability
Lens
Fluid A Fluid B

Fluid A Fluid B

(a) (b)

Fluid B
Fluid B

Fluid A Fluid A Fluid A

(c) (d)

Fluid B

Fluid A

(e)
Fig. 6.6 Mixing geometries for two fluids: (a)and (b) are parallel mixing flows of the type
discussed in this paper; (c) is a parallel mixing flow but the second fluid is generated within the
flow field of the first fluid; (d)and (e) are perpendicular mixing flows where one fluid is injected
normal to the flow field of the other fluid