WOLFRAM SYSTEM MODELER
SimpleAirAir: Simple dry air model (0..100 degC) |
 |
Package Constants (31)
| ThermoStates |
Value: Modelica.Media.Interfaces.Choices.IndependentVariables.pT Type: IndependentVariables Description: Enumeration type for independent variables |
|---|---|
| mediumName |
Value: "SimpleAir" Type: String Description: Name of the medium |
| substanceNames |
Value: {mediumName} Type: String[:] Description: Names of the mixture substances. Set substanceNames={mediumName} if only one substance. |
| extraPropertiesNames |
Value: fill("", 0) Type: String[:] Description: Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused |
| singleState |
Value: false Type: Boolean Description: = true, if u and d are not a function of pressure |
| reducedX |
Value: true Type: Boolean Description: = true if medium contains the equation sum(X) = 1.0; set reducedX=true if only one substance (see docu for details) |
| fixedX |
Value: true Type: Boolean Description: = true if medium contains the equation X = reference_X |
| reference_p |
Value: 101325 Type: AbsolutePressure (Pa) Description: Reference pressure of Medium: default 1 atmosphere |
| reference_T |
Value: 298.15 Type: Temperature (K) Description: Reference temperature of Medium: default 25 deg Celsius |
| reference_X |
Value: fill(1 / nX, nX) Type: MassFraction[nX] (kg/kg) Description: Default mass fractions of medium |
| p_default |
Value: 101325 Type: AbsolutePressure (Pa) Description: Default value for pressure of medium (for initialization) |
| T_default |
Value: Modelica.Units.Conversions.from_degC(20) Type: Temperature (K) Description: Default value for temperature of medium (for initialization) |
| h_default |
Value: specificEnthalpy_pTX(p_default, T_default, X_default) Type: SpecificEnthalpy (J/kg) Description: Default value for specific enthalpy of medium (for initialization) |
| X_default |
Value: reference_X Type: MassFraction[nX] (kg/kg) Description: Default value for mass fractions of medium (for initialization) |
| C_default |
Value: fill(0, nC) Type: ExtraProperty[nC] Description: Default value for trace substances of medium (for initialization) |
| nS |
Value: size(substanceNames, 1) Type: Integer Description: Number of substances |
| nX |
Value: nS Type: Integer Description: Number of mass fractions |
| nXi |
Value: if fixedX then 0 else if reducedX then nS - 1 else nS Type: Integer Description: Number of structurally independent mass fractions (see docu for details) |
| nC |
Value: size(extraPropertiesNames, 1) Type: Integer Description: Number of extra (outside of standard mass-balance) transported properties |
| C_nominal |
Value: 1.0e-6 * ones(nC) Type: Real[nC] Description: Default for the nominal values for the extra properties |
| cp_const |
Value: 1005.45 Type: SpecificHeatCapacity (J/(kg⋅K)) Description: Constant specific heat capacity at constant pressure |
| cv_const |
Value: cp_const - R_gas Type: SpecificHeatCapacity (J/(kg⋅K)) Description: Constant specific heat capacity at constant volume |
| R_gas |
Value: Constants.R / MM_const Type: SpecificHeatCapacity (J/(kg⋅K)) Description: Medium specific gas constant |
| MM_const |
Value: 0.0289651159 Type: MolarMass (kg/mol) Description: Molar mass |
| eta_const |
Value: 1.82e-5 Type: DynamicViscosity (Pa⋅s) Description: Constant dynamic viscosity |
| lambda_const |
Value: 0.026 Type: ThermalConductivity (W/(m⋅K)) Description: Constant thermal conductivity |
| T_min |
Value: Cv.from_degC(0) Type: Temperature (K) Description: Minimum temperature valid for medium model |
| T_max |
Value: Cv.from_degC(100) Type: Temperature (K) Description: Maximum temperature valid for medium model |
| T0 |
Value: reference_T Type: Temperature (K) Description: Zero enthalpy temperature |
| fluidConstants |
Value: airConstants Type: FluidConstants[nS] Description: Fluid constants |
| airConstants |
Value: {Modelica.Media.Interfaces.Types.Basic.FluidConstants(iupacName = "simple air", casRegistryNumber = "not a real substance", chemicalFormula = "N2, O2", structureFormula = "N2, O2", molarMass = Modelica.Media.IdealGases.Common.SingleGasesData.N2.MM)} Type: FluidConstants[nS] Description: Constant data for the fluid |
Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Simple Ideal gas air model for low temperatures
This model demonstrates how to use the PartialSimpleIdealGas base class to build a simple ideal gas model with a limited temperature validity range.
Wolfram Language
In[1]:=
SystemModel["Modelica.Media.Air.SimpleAir"]
Out[1]:=
