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Settling
/ Cross Sectional
Velocity
Spreadsheet
Below is a link
to a Settling Velocity Spreadsheet developed by
Hydro-Flo Technologies.By inputting the major design criteria,
you can solve for the settling, cross sectional velocity of a
Parallel Plate clarifier.
The spreadsheet operates on Microsoft Excel 2003 or later.
Clarifier settling,
cross sectional velocity calculations
Below is a sample shot of the spreadsheet.
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Settling Velocity Calculations |
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| Vs=[(4g (Ss-1) d) / 3 Cd]^1/2
Where:
g=
acceleration of gravity in FT/S^2 |
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Cd= coefficient of drag = (24/R) +
(3/R^1/2) + 0.34 |
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Ss= specific gravity of droplet |
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d= diameter of droplet in
microns |
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MAX=====> |
R= 500 ; |
Cd= 0.52216 |
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R= 250 ; |
Cd= 0.62574 |
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R=100 ; |
Cd= 0.88 |
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MIN======> |
R=10 ; |
Cd= 3.68868 |
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Vs= [((1.5118 ft/s^2) (Ss-1) d) / 3 Cd)]^1/2 |
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Ss= |
1.40 |
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Note: If Ss > 1, then droplet will
settle, if Ss < 1, droplet will rise |
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d= |
100 |
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Cd= |
3.689 |
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Vs= |
2.337557008 |
Feet per Minute |
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