packagePartialSingleGasAndIncompressible

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.

Parameters

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