Classes
class	Arguments
	Command line front end of the gastable executable. More...
class	GasData
	The per species property record: the scalar data that describe a gas but do not depend on the state. More...
class	HeatPoly
	One temperature interval of the caloric description of a species. More...
class	HeatPolyCustom
	A caloric interval whose exponents are not the NASA-9 ones ( -2 … 4 ); used for the fitted cryogenic and hot extrapolations. More...
class	HeatPolyEmpty
	An empty polynomial that returns only zeros. More...
class	HeatPolyGlue
	A special polynomial that smoothly connects two other polynomials. More...
class	InputAlpha
	Reader for cubicalpha.inp, the fitted alpha function coefficients of Mahmoodi and Sedigh ( doi 10.1016/j.fluid.2016.12.015 ). More...
class	InputData
	Reader for gasdata.inp, the table of critical point and molecular data. More...
class	InputThermo
	a class that can read the thermo.inp More...
class	InputTransport
	Reader for trans.inp, the CEA transport property table. More...
struct	OpHeatPoly
struct	OpTransportPoly
class	RefGas
	A single chemical species with its caloric and transport properties. More...
class	RefGasFactory
	Builds RefGas objects from the shipped data tables. More...
class	TransportPoly
	One temperature interval of the transport description of a species. More...
class	TransportPolyCustom
	A transport interval whose exponents are not the CEA ones. More...
class	TransportPolyEmpty
	Placeholder for a species with no transport data at all. More...
class	TransportPolyGlue
	A short interval bridging two tabulated transport intervals. More...

Enumerations
enum class	State { PrintHelp = 0 , PrintTable = 1 , PrintUsage = 2 , PrintBanner = 3 , Undefined = 4 }
enum class	RefGasMode { POLY = 0 , SPLINE = 1 , UNDEFINED = 2 }
	how a RefGas evaluates its properties More...
enum class	TransportPolyType { VISCOSITY , CONDUCTIVITY , UNDEFINED }
enum class	TransportPolyKind { DEFAULT , CUSTOM , GLUE , EMPTY , UNDEFINED }

Functions
void	create_glue_poly (const real &aX, const real &aDeltaX, const Vector< real > &aF, Vector< real > &aC)
	this function creates the intermediate polynomials for cea
string	data_path ()
	Return the directory holding the gas tables.
bool	data_available ()
	Test whether the gas tables can be found.
string	fix_capitals (const string &aLabel)
	fix capitalization of components, eg XE --> Xe
string	fix_label (const string &aLabel)
	fix illogical naming in CEA, eg AL --> Al, CL --> Cl
real	idgas_lambda (RefGas *aGas, const real T)
	calculate the conductivity in case there is no data in the database
real	idgas_mu (RefGas *aGas, const real T)
	calculate the viscosity in case there is no data in the database
bool	is_noble (const string &aLabel)
std::string_view	trim_field (const std::string_view aField)
real	parse_real (const std::string_view aField, const char *aContext)
	locale-independent, non-throwing replacement for std::stod in the fixed-column parsers; aborts with context on a malformed field
real	parse_real_optional (const std::string_view aField, const real aFallback, const char *aContext)
	like parse_real, but an empty or whitespace-only field returns the given fallback instead of aborting
int	parse_int (const std::string_view aField, const char *aContext)
	locale-independent, non-throwing replacement for std::stoi
std::string	parse_field (const std::string &aLine, const size_t aPos, const size_t aCount, const char *aContext)
	bounds-checked substring for fixed-column records; aborts with context if the line is shorter than the requested window start

Variables
constexpr char	gGastablesSubdir [] = "/fluid"
	subdirectory of the data path that holds the gas tables
constexpr char	gGastablesMarker [] = "/gasdata.inp"
	a directory counts as the gas table directory if this file is in it
const real	gTref = BELFEM_TREF
const real	gPref = BELFEM_PREF
const real	gTmax = 13000.0
const real	gTmin = 100.0
const real	gPmin = 1e-4
const real	gDeltaT = 5.0
const uint	gNumberOfSplinePoints = ( uint ) ( gTmax / gDeltaT ) + 1

Enumeration Type Documentation

◆ RefGasMode

enum class belfem::gastables::RefGasMode

strong

how a RefGas evaluates its properties

POLY : directly from the piecewise NASA-9 polynomials, exact but with a linear search for the interval that holds T SPLINE : from cubic splines sampled off those polynomials, which is what the factory leaves every gas in

Enumerator
POLY
SPLINE
UNDEFINED

◆ State

enum class belfem::gastables::State

strong

Enumerator
PrintHelp
PrintTable
PrintUsage
PrintBanner
Undefined

◆ TransportPolyKind

enum class belfem::gastables::TransportPolyKind

strong

Enumerator
DEFAULT
CUSTOM
GLUE
EMPTY
UNDEFINED

◆ TransportPolyType

enum class belfem::gastables::TransportPolyType

strong

Enumerator
VISCOSITY
CONDUCTIVITY
UNDEFINED

Function Documentation

◆ create_glue_poly()

void belfem::gastables::create_glue_poly	(	const real &	aX,
		const real &	aDeltaX,
		const Vector< real > &	aF,
		Vector< real > &	aC )

inline

this function creates the intermediate polynomials for cea

◆ data_available()

bool belfem::gastables::data_available ( )

Test whether the gas tables can be found.

Never aborts, so a caller can degrade gracefully rather than fail to construct.

◆ data_path()

string belfem::gastables::data_path ( )

Return the directory holding the gas tables.

If gBelfemDataPath is set, which Communicator::set_globals() does from $BELFEM_DATA and a config file may also do, its fluid subdirectory is returned without being checked, so a wrong path fails where the file is opened rather than falling through to a different directory. Otherwise share/fluid is searched relative to the working directory. Returns an empty string if neither holds the tables.

◆ fix_capitals()

string belfem::gastables::fix_capitals ( const string & aLabel )

fix capitalization of components, eg XE --> Xe

◆ fix_label()

string belfem::gastables::fix_label ( const string & aLabel )

fix illogical naming in CEA, eg AL --> Al, CL --> Cl

◆ idgas_lambda()

real belfem::gastables::idgas_lambda	(	RefGas *	aGas,
		const real	T )

calculate the conductivity in case there is no data in the database

◆ idgas_mu()

real belfem::gastables::idgas_mu	(	RefGas *	aGas,
		const real	T )

calculate the viscosity in case there is no data in the database

◆ is_noble()

bool belfem::gastables::is_noble ( const string & aLabel )

inline

◆ parse_field()

std::string belfem::gastables::parse_field	(	const std::string &	aLine,
		const size_t	aPos,
		const size_t	aCount,
		const char *	aContext )

inline

bounds-checked substring for fixed-column records; aborts with context if the line is shorter than the requested window start

◆ parse_int()

int belfem::gastables::parse_int	(	const std::string_view	aField,
		const char *	aContext )

inline

locale-independent, non-throwing replacement for std::stoi

◆ parse_real()

real belfem::gastables::parse_real	(	const std::string_view	aField,
		const char *	aContext )

inline

locale-independent, non-throwing replacement for std::stod in the fixed-column parsers; aborts with context on a malformed field

◆ parse_real_optional()

real belfem::gastables::parse_real_optional	(	const std::string_view	aField,
		const real	aFallback,
		const char *	aContext )

inline

like parse_real, but an empty or whitespace-only field returns the given fallback instead of aborting

◆ trim_field()

std::string_view belfem::gastables::trim_field ( const std::string_view aField )

inline

Variable Documentation

◆ gDeltaT

const real belfem::gastables::gDeltaT = 5.0

◆ gGastablesMarker

char belfem::gastables::gGastablesMarker[] = "/gasdata.inp"

constexpr

a directory counts as the gas table directory if this file is in it

◆ gGastablesSubdir

char belfem::gastables::gGastablesSubdir[] = "/fluid"

constexpr

subdirectory of the data path that holds the gas tables

◆ gNumberOfSplinePoints

const uint belfem::gastables::gNumberOfSplinePoints = ( uint ) ( gTmax / gDeltaT ) + 1

◆ gPmin

const real belfem::gastables::gPmin = 1e-4

◆ gPref

const real belfem::gastables::gPref = BELFEM_PREF

◆ gTmax

const real belfem::gastables::gTmax = 13000.0

◆ gTmin

const real belfem::gastables::gTmin = 100.0

◆ gTref

const real belfem::gastables::gTref = BELFEM_TREF

Classes

Enumerations

Functions

Variables

Enumeration Type Documentation

◆ RefGasMode

◆ State

◆ TransportPolyKind

◆ TransportPolyType

Function Documentation

◆ create_glue_poly()

◆ data_available()

◆ data_path()

◆ fix_capitals()

◆ fix_label()

◆ idgas_lambda()

◆ idgas_mu()

◆ is_noble()

◆ parse_field()

◆ parse_int()

◆ parse_real()

◆ parse_real_optional()

◆ trim_field()

Variable Documentation

◆ gDeltaT

◆ gGastablesMarker

◆ gGastablesSubdir

◆ gNumberOfSplinePoints

◆ gPmin

◆ gPref

◆ gTmax

◆ gTmin

◆ gTref