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HelmholtzEquationOfState Class

Equation of state based on the dimensionless Helmholtz energy, both for pure fluids and for mixtures of fluids.
Inheritance Hierarchy

Namespace: Altaxo.Science.Thermodynamics.Fluids
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3261.0 (4.8.3261.0)
Syntax
C#
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public abstract class HelmholtzEquationOfState

The HelmholtzEquationOfState type exposes the following members.

Constructors
 NameDescription
Protected methodHelmholtzEquationOfStateInitializes a new instance of the HelmholtzEquationOfState class
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Properties
 NameDescription
Public propertyMolecularWeight Gets the (typical) molecular weight of the fluid.
Public propertyReducingMassDensity Gets the density (in kg/m³) used to calculate the reduced (dimensionless) density.
Public propertyReducingMoleDensity Gets the molar density (in mol/m³) used to calculate the reduced (dimensionless) density.
Public propertyReducingTemperature Gets the temperature (in Kelvin) that is used to calculate the inverse reduced temperature.
Public propertyWorkingSpecificGasConstant Gets the specific gas constant of the fluid. Is calculated from WorkingUniversalGasConstant and MolecularWeight.
Public propertyWorkingUniversalGasConstant Gets the universal gas constant that was used at the time this model was developed.
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Methods
 NameDescription
Public methodEqualsDetermines whether the specified object is equal to the current object.
(Inherited from Object)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object)
Public methodGetDeltaFromMassDensity Gets the reduced density by density / ReducingMassDensity.
Public methodGetDeltaFromMoleDensity Gets the reduced density by density / ReducingMassDensity.
Public methodGetHashCodeServes as the default hash function.
(Inherited from Object)
Public methodGetTauFromTemperature Gets the inverse reduced temperature by ReducingTemperature / temperature.
Public methodGetTypeGets the Type of the current instance.
(Inherited from Object)
Public methodIsentropicDerivativeOfMassSpecificVolumeWrtPressure_FromMoleDensityAndTemperature Gets the isentropic (adiabatic) derivative of the mass specific volume w.r.t. pressure from mole density and temperature.
Public methodIsentropicDerivativeOfMoleSpecificVolumeWrtPressure_FromMoleDensityAndTemperature Gets the isentropic (adiabatic) derivative of the mole specific volume w.r.t. pressure from mole density and temperature.
Public methodIsothermalCompressibility_FromMassDensityAndTemperature Gets the isothermal compressibility in 1/Pa from mass density (kg/m³) and temperature (K). Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodIsothermalCompressibility_FromMoleDensityAndTemperature Gets the isothermal compressibility in 1/Pa from mole density (mol/m³) and temperature (K). Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodIsothermalCompressionalModulus_FromMassDensityAndTemperature Gets the isothermal compressional modulus K in Pa from density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodIsothermalCompressionalModulus_FromMoleDensityAndTemperature Gets the isothermal compressional modulus in Pa from density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodIsothermalDerivativePressureWrtMassDensity_FromMassDensityAndTemperature Gets the derivative of pressure w.r.t. the mass density at isothermal conditions. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodIsothermalDerivativePressureWrtMoleDensity_FromMoleDensityAndTemperature Gets the derivative of pressure w.r.t. the mole density at isothermal conditions. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassDensity_FromMoleDensity Gets the mass density (in kg/m³) from mole density (in mol/m³).
Public methodMassDensity_FromPressureAndTemperature(Double, Double, Double) Gets the mass density for a given pressure and temperature.
Public methodMassDensity_FromPressureAndTemperature(Double, Double, Double, Double) Gets the mole density from a given pressure and temperature.
Public methodMassSpecificEnthalpy_FromMassDensityAndTemperature Get the enthalpy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificEnthalpy_FromMoleDensityAndTemperature Get the enthalpy from a given density and temperature.
Public methodMassSpecificEntropy_FromMassDensityAndTemperature Get the entropy from a given mole density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificEntropy_FromMoleDensityAndTemperature Get the entropy from a given mole density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificGibbsEnergy_FromMassDensityAndTemperature Get the mass specific Gibbs energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificGibbsEnergy_FromMoleDensityAndTemperature Get the mass specific Gibbs energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificHelmholtzEnergy_FromMassDensityAndTemperature Get the Helmholtz energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificHelmholtzEnergy_FromMoleDensityAndTemperature Get the mass specific Helmholtz energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificInternalEnergy_FromMassDensityAndTemperature Get the internal energy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificInternalEnergy_FromMoleDensityAndTemperature Get the internal energy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificIsobaricHeatCapacity_FromMassDensityAndTemperature Gets the isobaric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificIsobaricHeatCapacity_FromMoleDensityAndTemperature Gets the isobaric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificIsochoricHeatCapacity_FromMassDensityAndTemperature Get the isochoric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMassSpecificIsochoricHeatCapacity_FromMoleDensityAndTemperature Get the isochoric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Protected methodMemberwiseCloneCreates a shallow copy of the current Object.
(Inherited from Object)
Public methodMoleDensity_FromMassDensity Gets the mole density (in mol/m³) from mass density (in kg/m³).
Public methodMoleDensity_FromPressureAndTemperature(Double, Double, Double) Get the mole density for a given pressure and temperature.
Public methodMoleDensity_FromPressureAndTemperature(Double, Double, Double, Double) Gets the mole density from a given pressure and temperature.
Public methodMoleDensityEstimates_FromPressureAndTemperature Gets an estimate of the mole densities at a given pressure and temperature.
Public methodMoleSpecificEnthalpy_FromMassDensityAndTemperature Get the enthalpy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificEnthalpy_FromMoleDensityAndTemperature Get the enthalpy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificEntropy_FromMassDensityAndTemperature Get the entropy from a given mole density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificEntropy_FromMoleDensityAndTemperature Get the entropy from a given mole density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificGibbsEnergy_FromMassDensityAndTemperature Get the mole specific Gibbs energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificGibbsEnergy_FromMoleDensityAndTemperature Get the mole specific Gibbs energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificHelmholtzEnergy_FromMassDensityAndTemperature Get the Helmholtz energy from a given mass density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificHelmholtzEnergy_FromMoleDensityAndTemperature Get the Helmholtz energy from a given mole density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificInternalEnergy_FromMassDensityAndTemperature Get the internal energy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificInternalEnergy_FromMoleDensityAndTemperature Get the internal energy from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificIsobaricHeatCapacity_FromMassDensityAndTemperature Gets the isobaric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificIsobaricHeatCapacity_FromMoleDensityAndTemperature Gets the isobaric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificIsochoricHeatCapacity_FromMassDensityAndTemperature Get the mole specific isochoric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodMoleSpecificIsochoricHeatCapacity_FromMoleDensityAndTemperature Get the mole specific isochoric heat capacity from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodPhi0_OfReducedVariables Ideal part of the dimensionless Helmholtz energy as function of reduced variables. (Page 1541, Table 28)
Public methodPhi0_tau_OfReducedVariables First derivative of the dimensionless Helmholtz energy as function of reduced variables with respect to the inverse reduced temperature. (Page 1541, Table 28)
Public methodPhi0_tautau_OfReducedVariables Second derivative of Phi0 the of reduced variables with respect to the inverse reduced temperature. (Page 1541, Table 28)
Public methodPhiR_delta_OfReducedVariables Calculates the first derivative of the residual part of the dimensionless Helmholtz energy with respect to the reduced density delta.
Public methodPhiR_deltadelta_OfReducedVariables Calculates the second derivative of the residual part of the dimensionless Helmholtz energy with respect to the reduced density delta.
Public methodPhiR_deltatau_OfReducedVariables Calculates the derivative of the residual part of the dimensionless Helmholtz energy with respect to the reduced density delta and the inverse reduced temperature tau.
Public methodPhiR_OfReducedVariables Calculates the residual part of the dimensionless Helmholtz energy in dependence on reduced density and reduced inverse temperature.
Public methodPhiR_tau_OfReducedVariables Calculates the first derivative of the residual part of the dimensionless Helmholtz energy with respect to the inverse reduced temperature.
Public methodPhiR_tautau_OfReducedVariables Calculates the second derivative of the residual part of the dimensionless Helmholtz energy with respect to the inverse reduced temperature.
Protected methodStatic memberPow2 
Public methodPressure_FromMassDensityAndTemperature Get the pressure from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodPressure_FromMoleDensityAndTemperature Gets the pressure from a given molar density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodSpeedOfSound_FromMassDensityAndTemperature Get the speed of sound from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodSpeedOfSound_FromMoleDensityAndTemperature Get the speed of sound from a given density and temperature. Attention - unchecked function: it is presumed, but not checked (!), that the given parameter combination describes a single phase fluid!.
Public methodToStringReturns a string that represents the current object.
(Inherited from Object)
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Fields
 NameDescription
Public fieldStatic memberUniversalGasConstant The universal gas constant in J/(K mol)
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See Also