3.4.1 hall_yarborough - Hall-Yarborough equation of state

z = hall_yarborough(ppr, tpr)

Computes the compressebility factor using the Hall-Yarborough method using the pseudo-reduced pressure and temperature.

Arguments

ppr

Pseudo-reduced pressure .

tpr

Pseudo-reduced temperature .

Returns Compressebility factor .

Possible Errors

Hall-Yarborough model only valid for Tpr >= 1

The Hall-Yarborough equation requires that .