For the sufficiently narrow pressure range the simplest correlation is given by:

(1)	$\begin{array}{l}\displaystyle \mu(T, \rho) = \mu^(T) \cdot (1 + \rho \cdot B^(T))\end{array}$

where

$\begin{array}{l}T\end{array}$	fluid temperature
$\begin{array}{l}\rho\end{array}$	fluid density
$\begin{array}{l}\mu(T, \rho)\end{array}$	Dynamic fluid viscosity
$\begin{array}{l}\mu^*(T) = \mu(T, \rho =0)\end{array}$	some function of temperature $\begin{array}{l}T\end{array}$ related to dynamic fluid viscosity at zero density $\begin{array}{l}\rho = 0\end{array}$
$\begin{array}{l}B^*(T)\end{array}$	some function of temperature $\begin{array}{l}T\end{array}$ related to the second virial coefficient $\begin{array}{l}B_2(T)\end{array}$

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