Gas-water Model Characteristic curves ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The gas-water model requires the definition of a capillary pressure curve for the interface between the gas and the water phases, and relative permeability for the water and the gas in water. An example is: :: CHARACTERISTIC_CURVES gas_water_example TABLE swfn_table PRESSURE_UNITS Bar EXTERNAL_FILE swfn_file.dat END TABLE sgfn_table PRESSURE_UNITS Bar EXTERNAL_FILE sgfn_file.dat END END Where the file “swfn_file.dat” contains the water saturation table: :: SWFN 0.0 0 0.4 0.1 0 0.3 0.9 1 0.2 1.0 1 0.1 / The file “sgfn_file.dat” contains the gas saturation table: :: SGFN 0.0 0 0 0.10 0.0 0 0.255 0.15 0 0.51 0.4 0 0.765 0.8 0 1.0 1.0 0 / Note that the capillary pressure entered with the water function table will be used as the aqueous phase/gas phase capillary pressure. The capillary pressure entered with the gas function table will be ignored.