NASA7 Namespace Reference

Standard-state thermodynamic properties of ideal-gas species from NASA 7-coefficient polynomials. More...

Classes
struct	SpeciesData
	NASA 7-coefficient data of one species. More...

Typedefs
using	Coefficients = std::array< Real, 7 >
	Coefficients a_0, ..., a_6 of the polynomial for one temperature interval.

Functions
const SpeciesData &	speciesData (const std::string &name)
	Data of a built-in species.
std::string	speciesNames ()
	Names of the built-in species, separated by spaces.
template<typename CppType >
const Coefficients &	coefficients (const SpeciesData &data, const CppType &T)
	Coefficients of the polynomial that applies at a temperature.
template<typename CppType >
CppType	cpOverR (const SpeciesData &data, const CppType &T)
	Standard-state molar isobaric heat capacity divided by the gas constant, cp/R.
template<typename CppType >
CppType	hOverRT (const SpeciesData &data, const CppType &T)
	Standard-state molar enthalpy divided by the gas constant and temperature, h/(RT)
template<typename CppType >
CppType	sOverR (const SpeciesData &data, const CppType &T)
	Standard-state molar entropy divided by the gas constant, s/R, at the reference pressure of the data (reference_pressure for the built-in species)

Variables
constexpr Real	reference_pressure = 101325.0
	Pressure at which the standard-state entropy of the built-in species applies [Pa].

Detailed Description

Standard-state thermodynamic properties of ideal-gas species from NASA 7-coefficient polynomials.

Each species has two polynomials, one for temperatures up to a midpoint temperature and one above it. The evaluators return the dimensionless forms cp/R, h/(RT), and s/R, so that they are independent of the value of the universal gas constant.

Typedef Documentation

Coefficients

using NASA7::Coefficients = typedef std::array<Real, 7>

Coefficients a_0, ..., a_6 of the polynomial for one temperature interval.

Definition at line 28 of file NASA7Polynomials.h.

Function Documentation

coefficients()

template<typename CppType >

const Coefficients & NASA7::coefficients	(	const SpeciesData &	data,
		const CppType &	T
	)

Coefficients of the polynomial that applies at a temperature.

The low-temperature polynomial applies at the midpoint temperature itself, as in Cantera. The temperature range of the fit is not checked.

Definition at line 69 of file NASA7Polynomials.h.

{
  return MetaPhysicL::raw_value(T) <= data.T_mid ? data.low : data.high;
}

Referenced by cpOverR(), hOverRT(), and sOverR().

cpOverR()

template<typename CppType >

CppType NASA7::cpOverR	(	const SpeciesData &	data,
		const CppType &	T
	)

Standard-state molar isobaric heat capacity divided by the gas constant, cp/R.

Definition at line 77 of file NASA7Polynomials.h.

{
  const auto & a = coefficients(data, T);
  return a[0] + T * (a[1] + T * (a[2] + T * (a[3] + T * a[4])));
}

Referenced by NASA7IdealGasFluidProperties::cp_from_T(), NASA7IdealGasFluidProperties::cv_from_T(), NASA7IdealGasFluidProperties::gamma_from_T(), NASA7IdealGasFluidProperties::k_from_T(), NASA7IdealGasFluidProperties::T_from_energy(), NASA7IdealGasFluidProperties::T_from_p_s(), TEST(), and TEST_F().

hOverRT()

template<typename CppType >

CppType NASA7::hOverRT	(	const SpeciesData &	data,
		const CppType &	T
	)

Standard-state molar enthalpy divided by the gas constant and temperature, h/(RT)

Definition at line 86 of file NASA7Polynomials.h.

{
  const auto & a = coefficients(data, T);
  return a[0] + T * (a[1] / 2 + T * (a[2] / 3 + T * (a[3] / 4 + T * a[4] / 5))) + a[5] / T;
}

Referenced by NASA7IdealGasFluidProperties::e_from_T(), NASA7IdealGasFluidProperties::h_from_T(), NASA7IdealGasFluidProperties::T_from_energy(), and TEST().

sOverR()

template<typename CppType >

CppType NASA7::sOverR	(	const SpeciesData &	data,
		const CppType &	T
	)

Standard-state molar entropy divided by the gas constant, s/R, at the reference pressure of the data (reference_pressure for the built-in species)

Definition at line 98 of file NASA7Polynomials.h.

{
  using std::log;
  const auto & a = coefficients(data, T);
  return a[0] * log(T) + T * (a[1] + T * (a[2] / 2 + T * (a[3] / 3 + T * a[4] / 4))) + a[6];
}

Referenced by NASA7IdealGasFluidProperties::T_from_p_s(), and TEST().

speciesData()

const SpeciesData & NASA7::speciesData

(

const std::string &

name

)

Data of a built-in species.

Parameters

[in]

name

species name: H2, O2, H2O, CH4, CO, CO2, or N2

Definition at line 159 of file NASA7Polynomials.C.

{
  for (const auto & data : species_data)
    if (data.name == name)
      return data;
 
  mooseError("Unknown NASA-7 species '", name, "'.");
}

Referenced by TEST(), TEST(), TEST_F(), TEST_F(), and TEST_F().

speciesNames()

std::string NASA7::speciesNames

(

)

Names of the built-in species, separated by spaces.

Definition at line 169 of file NASA7Polynomials.C.

{
  std::vector<std::string> names;
  for (const auto & data : species_data)
    names.push_back(data.name);
  return MooseUtils::join(names, " ");
}

Referenced by NASA7IdealGasFluidProperties::validParams().

Variable Documentation

reference_pressure

constexpr Real NASA7::reference_pressure = 101325.0

constexpr

Pressure at which the standard-state entropy of the built-in species applies [Pa].

Definition at line 50 of file NASA7Polynomials.h.

Referenced by NASA7IdealGasFluidProperties::T_from_p_s().