Fluids for the AA2 example simulation
- Last UpdatedSep 19, 2024
- 1 minute read
This example uses three custom fluids that reside in the simulation-specific model library.
|
Fluid |
Description |
|---|---|
|
Nitrogen |
This custom Compositional fluid uses the Soave-Redlich-Kwong (SRK) method to model liquid nitrogen. The composition is 100% nitrogen with an initial pressure of 100 kPa (0.987 atm) and an initial temperature of 77.24 K (-320.6°F). |
|
Cryo_H2 |
This custom IsomericHydrogen fluid has the initial composition and properties listed in Table 1 in Process description for the AA2 example simulation. It uses an equilibrium reaction model (EQOPH2) from the simulation-specific model library to calculate the ratio of hydrogen spin isomers at various temperatures. See Reaction model for the AA2 example simulation for more information. |
|
Refr_Cryo_H2 |
This custom IsomericHydrogen fluid is identical to Cryo_H2 but does not use the EQOPH2 equilibrium reaction model. |
An IsomericHydrogen fluid implements the rigorous hydrogen thermodynamic properties for orthohydrogen and parahydrogen published in Leachman et al.1. The software calculates mixture properties by using the ideal mixing rules according to the GERG-2004 equation of state2. It determines the vapor-liquid equilibrium by assuming a pseudo-pure component vapor pressure that uses a mole-fraction weighted average of the ortho and para component vapor pressures. We assume that the vapor and liquid phases have the same composition at equilibrium conditions. The enthalpy model, which we have developed by using available published data, calculates the heat of conversion from orthohydrogen to parahydrogen.