Configure the equilibrium options for a Fluid Type that uses the Grayson-Streed or Improved Grayson-Streed method

The Equilibrium Options section in the Fluid Editor provides a set of advanced equilibrium options that allow you to adjust your equilibrium calculations to suit your needs. The equilibrium options that are available depend on the type of thermodynamic method that you use as the System method for your Fluid Type.

The Grayson-Streed and Improved Grayson-Streed methods have similar equilibrium options.

Configure the equilibrium options

1. Open the Fluid Type in the Fluid Editor if the Fluid Type is not already open.

2. Expand the Equilibrium Options section if it is not already visible.

   

3. (Optional) Select the Include Fugacity Coefficient Variables in Fluid State checkbox to add variables for the fugacity coefficients to the Fluid State model.

   You can now view the calculated values for the fugacity coefficients or use them in other areas of the simulation.

4. (Optional) Expand the Method Data section, and then update the thermodynamic data on the SRK and SRK_Alpha tabs.

   Any changes to the data in this section will override the thermodynamic data from the default binary interaction data banks for the Soave-Redlich-Kwong (SRK) equation of state. See Overrides for thermodynamic method data for more information.

   The Grayson-Streed and Improved Grayson-Streed methods use the SRK equation of state to calculate the vapor density for the fluid.