PPDS 5: For viscosity h of the gas at low pressures (p < 600 kPa)

h = a0×Tr / {1 + a1×(Tr - 1)× Tra2}1/6; where Tr = T/Tc and Tc is the critical temperature.

Evaluation Results:

The example is for fitted thermal conductivities for the saturated liquid phase of pentane.