The Z-factor
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These correlations are usually modelled through the pseudo-reduced fluid properties
: LaTeX Math Inline body --uriencoded--(T_%7Bpr%7D, P_%7Bpr%7D)
| Pseudo-reduced temperature |
| Pseudo-critical temperature | ||||||||
| Pseudo-reduced pressure |
| Pseudo-critical pressure |
Charts
Implicit Correlations
Hall and Yarborough’s correlation (Trube 1957) Dranchuk, Purvis and Robinson’s Correlation (Dranchuket al. 1971) Dranchuk and Abou-Kassem’s correlation (Abou-kassemand Dranchuk 1975) |
These correlations are quite accurate and work in a wide range of pressure and temperature but computationally expensive and may have problems with convergence when approaching the critical temperature.
Explicit Correlations
Kareem Z-factor Correlation @model (2016) Sanjari and Nemati’s Correlation (2012) Azizi, Behbahani and Isazadeh’s Correlation (2010) Heidaryan, Moghdasi and Rahimi’s Correlation (2010) |
The explicit correlations do not have convergence issues and provide fast computing.
See also
Natural Science / Physics /Thermodynamics / Equation of State / Z-factor
