packagePartialSingleGasAndIncompressible
Extends from ThermofluidStream.Media.myMedia.Interfaces.PartialMedium.
Information
Gas medium combined with incompressible medium. Only the parameters to PartialMedium and selection of SingleGases and Incompressible are incomplete.
Observe that this implementation only works for Incompressible with one substance .
It is assumed that the gas and the liquid do not interact. This is a simplification since many substances mix , e. g. water and air where there is air molecules mixed into the liquid water and water steam mixed in the air.
To calculate the media properties a linear interpolation based on the mass-fractions between the gas and liquid is performed. Depending on the chosen property this may be more or less meaningful. Whenever possible,
one shall therefore use the properties of gas and liquid directly. Compare e.g. with a typical refrigerant, where many of the properties are only defined in the one-phase regions.
The intended use for this media is in systems where the properties of the mix of the media is not very important to get absolutely correct, but where both of the substances of the mix can occur at any physical location
in the system, but then mostly in pure or nearly pure form.
Contents
| Name | Description |
|---|---|
| SingleGas | SingleGas choice |
| Incompressible | Incompressible choice |
| ThermodynamicState | |
| BaseProperties | Base properties (p, d, T, h, u, R_s, MM, and X of Incompressible mixed with SingleGases |
| setState_pTX | set the thermodynamic state record from p, T, X |
| setState_phX | |
| T_hX | |
| h_TX | |
| pressure | Return the pressure from the thermodynamic state |
| isentropicExponent | Return the isentropic exponent |
| temperature | Return the temperature from the thermodynamicstate |
| massFraction | Return the massfraction from the thermodynamic state |
| density | Return the density from the thermodynamic state |
| d_pT_Incompressible | |
| specificEnthalpy | Return the specific enthalpy from the thermodynamic state |
| specificEntropy | Return the specific entropy from the thermodynamic state, total mixing assumed |
| specificInternalEnergy | Return the specific internal energy from the thermodynamic state |
| specificGibbsEnergy | Return specific Gibbs energy from the thermodynamic state |
| specificHelmholtzEnergy | Return specific Helmholtz energy from thermodynamic state |
| specificHeatCapacityCp | Return specific heat capacity at constant pressure |
| specificHeatCapacityCv | Return specific heat capacity at constant volume |
| dynamicViscosity | Return dynamic viscosity from the thermodynamic state |
| thermalConductivity | Return thermal conductivity from thermodynamic state |
| molarMass | Return molar mass from the thermodynamic state |
Revisions
Author: Ingela Lind, M Sc, Ph D, Technical Fellow,
Simulation and Thermal Analysis,
Vehicle Systems,
SAAB Aerosystems, 2024