Difference between revisions of "Gas/Water Interfacial Tension"

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:<math> At\ T<74F,\  \sigma_w=\sigma_{74}</math>
 
:<math> At\ T<74F,\  \sigma_w=\sigma_{74}</math>
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:<math> At\ 74F<T<280F,\  \sigma_w=\frac{\sigma_{74} + (T - 68) * (\sigma_{280} - \sigma_{74})}{ (280 - 74)}</math>
+
:<math> At\ 74F<T<280F,\  \sigma_w=\frac{\sigma_{74} + (T - 74) * (\sigma_{280} - \sigma_{74})}{ (280 - 74)}</math>
 
:<math>At\ T>280F,\ \sigma_w=\sigma_{280}</math>
 
:<math>At\ T>280F,\ \sigma_w=\sigma_{280}</math>
  

Revision as of 08:10, 5 October 2020

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.

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