Modelica.Media.Air.DryAirNasa

Air: Detailed dry air model as ideal gas (200..6000 K)

Information


      

Extends from IdealGases.Common.SingleGasNasa (Medium model of an ideal gas based on NASA source).

Package Content

NameDescription
Modelica.Media.Air.DryAirNasa.dynamicViscosity dynamicViscosity Simple polynomial for dry air (moisture influence small), valid from 73.15 K to 373.15 K
Modelica.Media.Air.DryAirNasa.thermalConductivity thermalConductivity Simple polynomial for dry air (moisture influence small), valid from 73.15 K to 373.15 K
Inherited
Modelica.Media.IdealGases.Common.SingleGasNasa.ThermodynamicState ThermodynamicState thermodynamic state variables for ideal gases
Modelica.Media.IdealGases.Common.SingleGasNasa.FluidConstants FluidConstants Extended fluid constants
excludeEnthalpyOfFormation=trueIf true, enthalpy of formation Hf is not included in specific enthalpy h
referenceChoice=Choices.ReferenceEnthalpy.ZeroAt0KChoice of reference enthalpy
h_offset=0.0User defined offset for reference enthalpy, if referenceChoice = UserDefined
dataData record of ideal gas substance
fluidConstantsconstant data for the fluid
Modelica.Media.IdealGases.Common.SingleGasNasa.BaseProperties BaseProperties Base properties of ideal gas medium
Modelica.Media.IdealGases.Common.SingleGasNasa.setState_pTX setState_pTX Return thermodynamic state as function of p, T and composition X
Modelica.Media.IdealGases.Common.SingleGasNasa.setState_phX setState_phX Return thermodynamic state as function of p, h and composition X
Modelica.Media.IdealGases.Common.SingleGasNasa.setState_psX setState_psX Return thermodynamic state as function of p, s and composition X
Modelica.Media.IdealGases.Common.SingleGasNasa.setState_dTX setState_dTX Return thermodynamic state as function of d, T and composition X
Modelica.Media.IdealGases.Common.SingleGasNasa.setSmoothState setSmoothState Return thermodynamic state so that it smoothly approximates: if x > 0 then state_a else state_b
Modelica.Media.IdealGases.Common.SingleGasNasa.pressure pressure return pressure of ideal gas
Modelica.Media.IdealGases.Common.SingleGasNasa.temperature temperature return temperature of ideal gas
Modelica.Media.IdealGases.Common.SingleGasNasa.density density return density of ideal gas
Modelica.Media.IdealGases.Common.SingleGasNasa.specificEnthalpy specificEnthalpy Return specific enthalpy
Modelica.Media.IdealGases.Common.SingleGasNasa.specificInternalEnergy specificInternalEnergy Return specific internal energy
Modelica.Media.IdealGases.Common.SingleGasNasa.specificEntropy specificEntropy Return specific entropy
Modelica.Media.IdealGases.Common.SingleGasNasa.specificGibbsEnergy specificGibbsEnergy Return specific Gibbs energy
Modelica.Media.IdealGases.Common.SingleGasNasa.specificHelmholtzEnergy specificHelmholtzEnergy Return specific Helmholtz energy
Modelica.Media.IdealGases.Common.SingleGasNasa.specificHeatCapacityCp specificHeatCapacityCp Return specific heat capacity at constant pressure
Modelica.Media.IdealGases.Common.SingleGasNasa.specificHeatCapacityCv specificHeatCapacityCv Compute specific heat capacity at constant volume from temperature and gas data
Modelica.Media.IdealGases.Common.SingleGasNasa.isentropicExponent isentropicExponent Return isentropic exponent
Modelica.Media.IdealGases.Common.SingleGasNasa.velocityOfSound velocityOfSound Return velocity of sound
Modelica.Media.IdealGases.Common.SingleGasNasa.isentropicEnthalpyApproximation isentropicEnthalpyApproximation approximate method of calculating h_is from upstream properties and downstream pressure
Modelica.Media.IdealGases.Common.SingleGasNasa.isentropicEnthalpy isentropicEnthalpy Return isentropic enthalpy
Modelica.Media.IdealGases.Common.SingleGasNasa.isobaricExpansionCoefficient isobaricExpansionCoefficient Returns overall the isobaric expansion coefficient beta
Modelica.Media.IdealGases.Common.SingleGasNasa.isothermalCompressibility isothermalCompressibility Returns overall the isothermal compressibility factor
Modelica.Media.IdealGases.Common.SingleGasNasa.density_derp_T density_derp_T Returns the partial derivative of density with respect to pressure at constant temperature
Modelica.Media.IdealGases.Common.SingleGasNasa.density_derT_p density_derT_p Returns the partial derivative of density with respect to temperature at constant pressure
Modelica.Media.IdealGases.Common.SingleGasNasa.density_derX density_derX Returns the partial derivative of density with respect to mass fractions at constant pressure and temperature
Modelica.Media.IdealGases.Common.SingleGasNasa.cp_T cp_T Compute specific heat capacity at constant pressure from temperature and gas data
Modelica.Media.IdealGases.Common.SingleGasNasa.cp_Tlow cp_Tlow Compute specific heat capacity at constant pressure, low T region
Modelica.Media.IdealGases.Common.SingleGasNasa.cp_Tlow_der cp_Tlow_der Compute specific heat capacity at constant pressure, low T region
Modelica.Media.IdealGases.Common.SingleGasNasa.h_T h_T Compute specific enthalpy from temperature and gas data; reference is decided by the refChoice input, or by the referenceChoice package constant by default
Modelica.Media.IdealGases.Common.SingleGasNasa.h_T_der h_T_der derivative function for h_T
Modelica.Media.IdealGases.Common.SingleGasNasa.h_Tlow h_Tlow Compute specific enthalpy, low T region; reference is decided by the refChoice input, or by the referenceChoice package constant by default
Modelica.Media.IdealGases.Common.SingleGasNasa.h_Tlow_der h_Tlow_der Compute specific enthalpy, low T region; reference is decided by the refChoice input, or by the referenceChoice package constant by default
Modelica.Media.IdealGases.Common.SingleGasNasa.s0_T s0_T Compute specific entropy from temperature and gas data
Modelica.Media.IdealGases.Common.SingleGasNasa.s0_Tlow s0_Tlow Compute specific entropy, low T region
Modelica.Media.IdealGases.Common.SingleGasNasa.dynamicViscosityLowPressure dynamicViscosityLowPressure Dynamic viscosity of low pressure gases
Modelica.Media.IdealGases.Common.SingleGasNasa.thermalConductivityEstimate thermalConductivityEstimate Thermal conductivity of polyatomic gases(Eucken and Modified Eucken correlation)
Modelica.Media.IdealGases.Common.SingleGasNasa.molarMass molarMass return the molar mass of the medium
Modelica.Media.IdealGases.Common.SingleGasNasa.T_h T_h Compute temperature from specific enthalpy
Modelica.Media.IdealGases.Common.SingleGasNasa.T_ps T_ps Compute temperature from pressure and specific entropy
Modelica.Media.Interfaces.PartialPureSubstance.setState_pT setState_pT Return thermodynamic state from p and T
Modelica.Media.Interfaces.PartialPureSubstance.setState_ph setState_ph Return thermodynamic state from p and h
Modelica.Media.Interfaces.PartialPureSubstance.setState_ps setState_ps Return thermodynamic state from p and s
Modelica.Media.Interfaces.PartialPureSubstance.setState_dT setState_dT Return thermodynamic state from d and T
Modelica.Media.Interfaces.PartialPureSubstance.density_ph density_ph Return density from p and h
Modelica.Media.Interfaces.PartialPureSubstance.temperature_ph temperature_ph Return temperature from p and h
Modelica.Media.Interfaces.PartialPureSubstance.pressure_dT pressure_dT Return pressure from d and T
Modelica.Media.Interfaces.PartialPureSubstance.specificEnthalpy_dT specificEnthalpy_dT Return specific enthalpy from d and T
Modelica.Media.Interfaces.PartialPureSubstance.specificEnthalpy_ps specificEnthalpy_ps Return specific enthalpy from p and s
Modelica.Media.Interfaces.PartialPureSubstance.temperature_ps temperature_ps Return temperature from p and s
Modelica.Media.Interfaces.PartialPureSubstance.density_ps density_ps Return density from p and s
Modelica.Media.Interfaces.PartialPureSubstance.specificEnthalpy_pT specificEnthalpy_pT Return specific enthalpy from p and T
Modelica.Media.Interfaces.PartialPureSubstance.density_pT density_pT Return density from p and T
ThermoStatesEnumeration type for independent variables
mediumName="unusablePartialMedium"Name of the medium
substanceNames={mediumName}Names of the mixture substances. Set substanceNames={mediumName} if only one substance.
extraPropertiesNames=fill("", 0)Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused
singleState= true, if u and d are not a function of pressure
reducedX=true= true if medium contains the equation sum(X) = 1.0; set reducedX=true if only one substance (see docu for details)
fixedX=false= true if medium contains the equation X = reference_X
reference_p=101325Reference pressure of Medium: default 1 atmosphere
reference_T=298.15Reference temperature of Medium: default 25 deg Celsius
reference_X=fill(1/nX, nX)Default mass fractions of medium
p_default=101325Default value for pressure of medium (for initialization)
T_default=Modelica.SIunits.Conversions.from_degC(20)Default value for temperature of medium (for initialization)
h_default=specificEnthalpy_pTX(p_default, T_default, X_default)Default value for specific enthalpy of medium (for initialization)
X_default=reference_XDefault value for mass fractions of medium (for initialization)
nS=size(substanceNames, 1)Number of substances
nX=nSNumber of mass fractions
nXi=if fixedX then 0 else if reducedX then nS - 1 else nSNumber of structurally independent mass fractions (see docu for details)
nC=size(extraPropertiesNames, 1)Number of extra (outside of standard mass-balance) transported properties
Modelica.Media.Interfaces.PartialMedium.prandtlNumber prandtlNumber Return the Prandtl number
Modelica.Media.Interfaces.PartialMedium.heatCapacity_cp heatCapacity_cp alias for deprecated name
Modelica.Media.Interfaces.PartialMedium.heatCapacity_cv heatCapacity_cv alias for deprecated name
Modelica.Media.Interfaces.PartialMedium.beta beta alias for isobaricExpansionCoefficient for user convenience
Modelica.Media.Interfaces.PartialMedium.kappa kappa alias of isothermalCompressibility for user convenience
Modelica.Media.Interfaces.PartialMedium.density_derp_h density_derp_h Return density derivative wrt pressure at const specific enthalpy
Modelica.Media.Interfaces.PartialMedium.density_derh_p density_derh_p Return density derivative wrt specific enthalpy at constant pressure
Modelica.Media.Interfaces.PartialMedium.specificEnthalpy_pTX specificEnthalpy_pTX Return specific enthalpy from p, T, and X or Xi
Modelica.Media.Interfaces.PartialMedium.density_pTX density_pTX Return density from p, T, and X or Xi
Modelica.Media.Interfaces.PartialMedium.temperature_phX temperature_phX Return temperature from p, h, and X or Xi
Modelica.Media.Interfaces.PartialMedium.density_phX density_phX Return density from p, h, and X or Xi
Modelica.Media.Interfaces.PartialMedium.temperature_psX temperature_psX Return temperature from p,s, and X or Xi
Modelica.Media.Interfaces.PartialMedium.density_psX density_psX Return density from p, s, and X or Xi
Modelica.Media.Interfaces.PartialMedium.specificEnthalpy_psX specificEnthalpy_psX Return specific enthalpy from p, s, and X or Xi
AbsolutePressure Type for absolute pressure with medium specific attributes
Density Type for density with medium specific attributes
DynamicViscosity Type for dynamic viscosity with medium specific attributes
EnthalpyFlowRate Type for enthalpy flow rate with medium specific attributes
MassFlowRate Type for mass flow rate with medium specific attributes
MassFraction Type for mass fraction with medium specific attributes
MoleFraction Type for mole fraction with medium specific attributes
MolarMass Type for molar mass with medium specific attributes
MolarVolume Type for molar volume with medium specific attributes
IsentropicExponent Type for isentropic exponent with medium specific attributes
SpecificEnergy Type for specific energy with medium specific attributes
SpecificInternalEnergy Type for specific internal energy with medium specific attributes
SpecificEnthalpy Type for specific enthalpy with medium specific attributes
SpecificEntropy Type for specific entropy with medium specific attributes
SpecificHeatCapacity Type for specific heat capacity with medium specific attributes
SurfaceTension Type for surface tension with medium specific attributes
Temperature Type for temperature with medium specific attributes
ThermalConductivity Type for thermal conductivity with medium specific attributes
PrandtlNumber Type for Prandtl number with medium specific attributes
VelocityOfSound Type for velocity of sound with medium specific attributes
ExtraProperty Type for unspecified, mass-specific property transported by flow
CumulativeExtraProperty Type for conserved integral of unspecified, mass specific property
ExtraPropertyFlowRate Type for flow rate of unspecified, mass-specific property
IsobaricExpansionCoefficient Type for isobaric expansion coefficient with medium specific attributes
DipoleMoment Type for dipole moment with medium specific attributes
DerDensityByPressure Type for partial derivative of density with resect to pressure with medium specific attributes
DerDensityByEnthalpy Type for partial derivative of density with resect to enthalpy with medium specific attributes
DerEnthalpyByPressure Type for partial derivative of enthalpy with resect to pressure with medium specific attributes
DerDensityByTemperature Type for partial derivative of density with resect to temperature with medium specific attributes
Modelica.Media.Interfaces.PartialMedium.Choices Choices Types, constants to define menu choices


Modelica.Media.Air.DryAirNasa.dynamicViscosity Modelica.Media.Air.DryAirNasa.dynamicViscosity

Simple polynomial for dry air (moisture influence small), valid from 73.15 K to 373.15 K

Information


Dynamic viscosity is computed from temperature using a second order polynomial with a range of validity between 73 and 373 K.

Extends from Modelica.Icons.Function (Icon for a function).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate Thermodynamic state record

Outputs

TypeNameDescription
DynamicViscosityetaDynamic viscosity [Pa.s]

Modelica definition

redeclare function dynamicViscosity 
  "Simple polynomial for dry air (moisture influence small), valid from 73.15 K to 373.15 K"
  extends Modelica.Icons.Function;
  input ThermodynamicState state "Thermodynamic state record";
  output DynamicViscosity eta "Dynamic viscosity";
algorithm 
  eta := Incompressible.TableBased.Polynomials_Temp.evaluate({(-4.96717436974791E-011), 5.06626785714286E-008, 1.72937731092437E-005}, Cv.to_degC(state.T));
end dynamicViscosity;

Modelica.Media.Air.DryAirNasa.thermalConductivity Modelica.Media.Air.DryAirNasa.thermalConductivity

Simple polynomial for dry air (moisture influence small), valid from 73.15 K to 373.15 K

Information


Thermal conductivity is computed from temperature using a second order polynomial with a range of validity between 73 and 373 K.

Extends from Modelica.Icons.Function (Icon for a function).

Inputs

TypeNameDefaultDescription
ThermodynamicStatestate Thermodynamic state record
Integermethod1Dummy for compatibility reasons

Outputs

TypeNameDescription
ThermalConductivitylambdaThermal conductivity [W/(m.K)]

Modelica definition

redeclare function thermalConductivity 
  "Simple polynomial for dry air (moisture influence small), valid from 73.15 K to 373.15 K"
  extends Modelica.Icons.Function;
  input ThermodynamicState state "Thermodynamic state record";
  input Integer method=1 "Dummy for compatibility reasons";
  output ThermalConductivity lambda "Thermal conductivity";
algorithm 
  lambda := Incompressible.TableBased.Polynomials_Temp.evaluate({(-4.8737307422969E-008), 7.67803133753502E-005, 0.0241814385504202},Cv.to_degC(state.T));

end thermalConductivity;

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