EOS4

Table 22. Primary Variables of EOS4

Phase Conditions	PrV1	PrV2	PrV3	PrV4	PrV5	PrV6
Gas	Pg	Pair	Xtr1	Xtr2	Xtr3	T
Aqueous	Pa	Pair	Xtr1	Xtr2	Xtr3	T
Two-Phase	Pg	Sg	Xtr1	Xtr2	Xtr3	Pair

Table 22 shows the parameters of default initial conditions for EOS4. In the table, Xtrn is tracer n mass fraction in the user specified phase. Pair is air partial pressure. Pg and Pa are pressure for gas and aqueous phase respectively. Sg is gas saturation. T is temperature. Xtr1-Xtr3 are optional. They are required only when the corresponding tracer component exists in the model.

User can use alternative set parameters as the initial conditions through defining initCType in input data record MODDE.1 or command line –i <parameter>

initCType =

“EOS3” reading the TOUGH3/EOS3 input files.

“EOS4” reading the TOUGH3/EOS4 input files.