The equations of state for a real gas are normally formulated in a particular unit system and, therefore, it is necessary to know the unit system being used for the RGP properties so that the CFX-Solver can automatically convert the properties to solution units. Five unit systems are available when using an .rgp file as follows:
UNITS=1(kg, m, s, K)UNITS=2(g, cm, s, K)UNITS=3(lbm, in, s, R)UNITS=4(slugs, ft, s, R)UNITS=5(slugs, in, s, R)
If desired, the solver solution units can be set to the same units as the .rgp file in CFX-Pre. For details, see Setting the Solution Units in the CFX-Pre User's Guide.