Environmental Engineering Reference
In-Depth Information
Fig. 4.3
Dependence of the width
w
of the mixing region (where 0
.
05
<
X
<
0
.
95) on tan
ʱ
;the
relationship, shown on the
left
, is approximately linear. The
right panel
shows the
X
profiles for
ʱ
=
50
ⓦ
,
,
10
30
Fig. 4.4
The
left panel
shows a phase diagram of solution regimes determined by total and relative
concentrations
(
X
0
,ˆ
)
, separated by transition curves
ˆ
,ˆ
B
and
ˆ
C
. Profiles in each region are
0
A
shown below, for total concentration
ˆ
(
left
) and for the individual concentrations
ˆ
,ˆ
1
2
Ridged A
(
ˆ
A
<ˆ
0
<ˆ
B
): When
ˆ
c
,
1
<ˆ
0
<ˆ
c
,
2
, the monodisperse theory
suggests that the lighter species
ˆ
1
is more likely to aggregate on the free surface
(
ˆ
1
ₒ
ˆ
m
as
s
ₒ
1) due to shear-induced migration while
ˆ
2
favours settling.
ˆ
1
Therefore, in this regime,
ˆ
1
is monotonically increasing (i.e.
>
0) with the
lighter particles mostly confined to a top region
[
s
tr
,
1
]
. The heavier particles settle
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