Solvent Ideal Gas Law

Defines the solvent as an ideal gas. See example with ideal density and enthalpy:

EOS SOLVENT
  DENSITY IDEAL
  ENTHALPY IDEAL_CO2
  VISCOSITY CONSTANT 0.03 cP
END

The type of ideal gas for the computation of enthalpy purposes can take the following values: IDEAL_METHANE, IDEAL_CO2. This value cannot be defaulted, for thermal problems or the code will return an error.

Viscosity units are optional, if not entered will default to \(Pa.s\)

The density is modelled with gas ideal law:

\[\rho( P , T )= \frac{P}{RT},\]

where:

\[R = 8.31446,\]

the gas ideal constant, units sJ/(mol K).

The Enthalpy will be computed differently based on the type of ideal gas selected above.

For IDEAL_METHANE the Enthalpy will be computed as:

\[h(T )= p_T,\]

where:

\[c_p = 35.69,\]

the constant pressure heat capacity of methane, units J/(mol K), at T = 288.15 K, P=1 bar.

For IDEAL_CO2 the Enthalpy will be computed as:

\[h(T )=c_v T + RT,\]

where:

\[c_v = 28.075,\]

the constant volume heat capacity of CO₂, units J/(mol K), at T = 15 C and P= 1 atm.