Gas/Water Interfacial Tension

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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.