Cantera  3.1.0a1
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ct_defs.h File Reference

This file contains definitions of constants, types and terms that are used in internal routines and are unlikely to need modifying. More...

#include "config.h"
#include <cmath>
#include <cstdlib>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <algorithm>
#include <memory>
#include <functional>
Include dependency graph for ct_defs.h:

Detailed Description

This file contains definitions of constants, types and terms that are used in internal routines and are unlikely to need modifying.

All physical constants are stored here (see module Physical Constants).

This file is included in every file within the Cantera namespace.

Definition in file ct_defs.h.

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Go to the source code of this file.

Namespaces

namespace  Cantera
 Namespace for the Cantera kernel.
 

Typedefs

typedef map< string, double > Composition
 Map from string names to doubles.
 

Variables

const double SmallNumber = 1.e-300
 smallest number to compare to zero.
 
const double BigNumber = 1.e300
 largest number to compare to inf.
 
const double Undef = -999.1234
 Fairly random number to be used to initialize variables against to see if they are subsequently defined.
 
const double Tiny = 1.e-20
 Small number to compare differences of mole fractions against.
 
const size_t npos = static_cast<size_t>(-1)
 index returned by functions to indicate "no position"
 
Numerical Constants
const double Pi = 3.14159265358979323846
 Pi.
 
const double Sqrt2 = 1.41421356237309504880
 Sqrt(2)
 
Defined Constants

These constants are defined by CODATA to have a particular value; see NIST Reference on Constants, Units, and Uncertainty.

const double Avogadro = 6.02214076e26
 Avogadro's Number \( N_{\mathrm{A}} \) [number/kmol].
 
const double Boltzmann = 1.380649e-23
 Boltzmann constant \( k \) [J/K].
 
const double Planck = 6.62607015e-34
 Planck constant \( h \) [J-s].
 
const double ElectronCharge = 1.602176634e-19
 Elementary charge \( e \) [C].
 
const double lightSpeed = 299792458.0
 Speed of Light in a vacuum \( c \) [m/s].
 
const double OneAtm = 1.01325e5
 One atmosphere [Pa].
 
const double OneBar = 1.0E5
 One bar [Pa].
 
Measured Constants

These constants are measured and reported by CODATA

const double fineStructureConstant = 7.2973525693e-3
 Fine structure constant \( \alpha \) [].
 
const double ElectronMass = 9.1093837015e-31
 Electron Mass \( m_e \) [kg].
 
Derived Constants

These constants are found from the defined and measured constants

const double GasConstant = Avogadro * Boltzmann
 Universal Gas Constant \( R_u \) [J/kmol/K].
 
const double logGasConstant = std::log(GasConstant)
 
const double GasConst_cal_mol_K = GasConstant / 4184.0
 Universal gas constant in cal/mol/K.
 
const double StefanBoltz = 2.0 * std::pow(Pi, 5) * std::pow(Boltzmann, 4) / (15.0 * std::pow(Planck, 3) * lightSpeed * lightSpeed)
 Stefan-Boltzmann constant \( \sigma \) [W/m2/K4].
 
const double Faraday = ElectronCharge * Avogadro
 Faraday constant \( F \) [C/kmol].
 
const double permeability_0 = 2 * fineStructureConstant * Planck / (ElectronCharge * ElectronCharge * lightSpeed)
 Permeability of free space \( \mu_0 \) [N/A2].
 
const double epsilon_0 = 1.0 / (lightSpeed * lightSpeed * permeability_0)
 Permittivity of free space \( \varepsilon_0 \) [F/m].
 
Thermodynamic Equilibrium Constraints

Integer numbers representing pairs of thermodynamic variables which are held constant during equilibration.

const int TV = 100
 
const int HP = 101
 
const int SP = 102
 
const int PV = 103
 
const int TP = 104
 
const int UV = 105
 
const int ST = 106
 
const int SV = 107
 
const int UP = 108
 
const int VH = 109
 
const int TH = 110
 
const int SH = 111
 
const int PX = 112
 
const int TX = 113
 
const int VT = -100
 
const int PH = -101
 
const int PS = -102
 
const int VP = -103
 
const int PT = -104
 
const int VU = -105
 
const int TS = -106
 
const int VS = -107
 
const int PU = -108
 
const int HV = -109
 
const int HT = -110
 
const int HS = -111
 
const int XP = -112
 
const int XT = -113