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.