# Water properties - Batzle and Wang model¶

The model from Batzle and Wang (1992) is also available for the computation of water density and viscosity, valid for a pressure and temperature range of $$5 < P < 100$$ MPa, and $$20 < T < 350$$ °C. This model is considered one of the most accurate for high level of salinity, up to 320000 mg/L. For more details, please refer to [BW92].

See example below:

EOS WATER
SURFACE_DENSITY 1004.0 kg/m^3
DENSITY BATZLE_AND_WANG 0
VISCOSITY BATZLE_AND_WANG
END


Note that in the BATZLE_AND_WANG example described above, the IFC67 default model is used for enthalpy, because no other model is specified.