Difference between revisions of "Lee correlation"

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[[Lee correlation]] is the empirical correlation for gas viscosity published in '''1966'''.
 
[[Lee correlation]] is the empirical correlation for gas viscosity published in '''1966'''.
  
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[[File:LeeSample.png||right|400px|Lee correlation at T=340F|right]]
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[[File:LeeSample.png||right|400px|link=https://www.pengtools.com/pvtCalculator|Lee correlation at T=340F|right]]
  
 
=== Math & Physics ===
 
=== Math & Physics ===

Revision as of 09:53, 3 May 2017

Brief

Lee correlation is the empirical correlation for gas viscosity published in 1966.

Lee correlation at T=340F

Math & Physics

\mu_g = \frac{K\ e^{(X\ \rho_g^Y)}}{10000} [1]

where

K = \frac{(9.4+0.02\ M_g)\ T^{1.5}}{(209+19M_g+T)}
X = 3.5+\frac{986}{T}+0.001M_g
Y = 2.4-0.2\ X
M_g = 28.967\ SG_g
\rho_g = \frac{1}{62.428} \times \frac{28.967\ SG_g\ p}{z\ 10.732\ T}

Discussion

Why the Lee correlation?

Application range

560 \le T < 800
100 < P \le 8000

Nomenclature

\rho_g = gas density, g/cm3
\mu_g = gas viscosity, cp
M_g = gas molecular weight, dimensionless
p = pressure, psia
SG_g = gas specific gravity, dimensionless
T = temperature, °R
z = gas compressibility factor, dimensionless

References

  1. ↑ Lee, A. B.; Gonzalez, M. H.; Eakin, B. E. (1966). "The Viscosity of Natural Gases". Journal of Petroleum Technology (SPE-1340-PA). 
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