Settling velocity of a dispersed-water droplet in oil: v = d²·(ρ_w − ρ_o)·g / (18·μ). The basis of centrifugal purifier sizing.
Formula
$$ v = \frac{d^2 (\rho_w - \rho_o) g}{18 \mu} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $d$ | Droplet diameter | m | input µm/10^6 |
| $\rho_w, \rho_o$ | Water and oil densities | kg/m³ | fluid property |
| $μ$ | Oil dynamic viscosity | Pa·s | ASTM D445 at T |
Sources
- Alfa Laval - Marine Purifier Theory.