Correction factor for facial tension (De Nouy ring method)

Input(s)

$R$: Radius of the Ring $(\mathrm{cm})$

$r$: Radius of the Ring String $(\mathrm{cm})$

$S$: Apparent Facial/Interfacial Tension (dyn/cm)

D: Specific Gravity of Lower Phase $\left(\mathrm{g} / \mathrm{cm}^{3}\right)$

$d$: Specific Gravity of Upper Phase $\left(\mathrm{g} / \mathrm{cm}^{3}\right)$

$l$: Perimeter of the Ring $(\mathrm{cm})$

Output(s)

C: Correction Factor (dimensionless)

Formula(s)

$$ \mathrm{C}=0.7250+\sqrt{\frac{0.01452 \cdot \mathrm{S}}{\mathrm{I}^{2}(\mathrm{D}-\mathrm{d})}+0.04534-\frac{1.679 \cdot \mathrm{r}}{\mathrm{R}}} $$

Reference(s)

Mihcakan, I.M., Alkan, K.H., Ugur, Z., Petroleum and Natural Gas Laboratory, Course Notes, I-Fluid Properties, ITU, Petroleum and Natural Gas Engineering, Istanbul, Turkey, 2001. Page: 4-4.