Gas/Water Interfacial Tension

Gas/Water Interfacial Tension

Gas/Water Interfacial Tension correlation was published by Baker and Swerdloff in 1956.

File:Gas/Water Interfacial Tension.png

Gas/Water Interfacial Tension correlation in the PVT software at pengtools.com

Math and Physics

$\sigma_{74} =75 - 1.108P^{0.349}$

$\sigma_{280} =53-0.1048P^{0.637}$

$At\ T<74F,\ \sigma_w=\sigma_{74}$

$At\ 74F<T<280F,\ \sigma_w=\frac{\sigma_{74} + (T - 74) * (\sigma_{280} - \sigma_{74})}{ (280 - 74)}$

$At\ T>280F,\ \sigma_w=\sigma_{280}$

Nomenclature

$P$ = pressure, psia

$\sigma_w$ = gas/water interfacial tension, dynes/cm

$T$ = temperature, °F

References

Baker, O. and Swerdloff, W. 1955. Calculation of Surface Tension 3—Calculating parachor Values. Oil Gas J. (5 December 1955): 141. Baker, O. and Swerdloff, W. 1956. Calculation of Surface Tension 6—Finding Surface Tension of Hydrocarbon Liquids. Oil Gas J. (2 January 1956): 125.