WF CARD: Settling Velocity Function Option
Optional
Card Description: Used to select the function used to define the fall velocity, for
both Sand and Clay.
Field
Variable
Value Description
0, C 1-2
IC1
WF
Card group identifier.
Make fall velocity a function of concentration. The
1
MSETV
0
functional form is
If concentration is greater than or equal to 0.3 kg/m3
then
VS(NN) = VS(NN) from WC cards
If concentration is greater than or equal to 0.3 kg/m3
then
VS(NN) = VS(NN) from WC
cards*CONN(NN)**(4/3)
Make fall velocity a function of concentration. The
1
functional form is
If concentration is greater than or equal to 1 kg/m3
then VS(NN) = VS(NN) from WC cards
If concentration is greater than or equal to 0.01
kg/m3 and less than 1 kg/m3 then
VS(NN) = VS(NN) from WC cards * CONC(NN)
** (4/3)
If concentration is less than or equal to 0.01 kg/m3
then
VS(NN) = VS(NN) from WC cards * (0.01)**(4/3)
Make fall velocity a function of concentration. The
2
functional form is
If concentration is less than or equal to CRFLOC
kg/m3 then
VS(NN) = VS(NN) from WC cards
If concentration is greater than or equal to CRFLOC
and less than CRHIND then
VS(NN) = VS(WC cards) * CONC(NN)/CRFLOC
** (4/3)
Critical concentration (kg/m3) above which
2
CRFLOC
+
flocculation increased the fall velocity (used only
for MSETV=2)
Critical concentration (kg/m3) above which hindered
3
CRHIND
+
settling leads to a constant fall velocity (used only
for MSETV=2)
Run Control WF Card 131
Users Guide To SED2D-WES
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