A class for viscosity model that is defined by The International Association for the Properties of Water and Steam IAPWS

With the definition, the viscosity is a function of temperature and water density

Attention

The critical enhancement,

$\bar{\mu}_2$ , which is significant only within the boundaries specified by

$T (\mbox{in K}) \in (645.91, 650.77)$

and

$\rho (\mbox{in kg m}^{-3}) \in (245.8, 405.3)$

, is not considered.

Additional info

No additional info.

Used in the following test data files

Used in no end-to-end test cases.