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Implicit Correlations
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These correlations are quite accurate and work in a wide range of pressures and temperatures but computationally expensive and may have problems with convergence when approaching the critical temperature.
Hall and Yarborough’s Z-factor correlation @model Dranchuk, Purvis and Robinson’s Correlation Robinson (Dranchuket al. 1971) | |
Kassem’s correlation (Abou-kassemand Dranchuk |
Explicit Correlations
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The explicit correlations do not have convergence issues, generate smooth derivatives for compressibility calculations and provide fast computing.
Artificial Neural Network correlations |
Ahmed (2017) |
Kareem (2016) |
Brill & Beggs (1973) |
Standing-Katz (1942 |
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Sanjari and Nemati’s Correlation (2012) |
Azizi, Behbahani and Isazadeh’s Correlation (2010) |
Heidaryan, Moghdasi and Rahimi’s Correlation (2010 |
) |
See also
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Natural Science / Physics /Thermodynamics / Equation of State / Z-factor
[ Pseudo-Critical Point Correlations @model ]