20: Fluid Composition and Properties
| Command | Purpose |
|---|---|
| add_water | Compute the mole fractions of a composition variable to include ambient water vapor pressure. The computation is done on a continuous basis. |
| gas_prop | Compute and update gas properties based on input variables in a continuous manner. |
| init_composition | Initialize gas composition for the test cell by reading specification files and updating shared memory. |
| init_emission | Initialize emission data by reading a specification file and updating shared memory for streams in use at a test cell. |
| init_properties | Initialize properties data in shared memory for CyFlex, including setting default values and processing thermodynamic data. |
| set_composition |
Update a composition variable by reading concentrations from specified real variables and transmitting the information via an event message at a defined process interval. |
| update_composition | Update gas composition data based on received events, calculate molar mass, and write to files when specified conditions are met. |