Cantera  2.4.0
Variables
Physical Constants
Global Data
Collaboration diagram for Physical Constants:

Variables

const doublereal Pi = 3.14159265358979323846
 Pi. More...
 

Variations of the Gas Constant

Cantera uses the MKS system of units. The unit for moles is defined to be the kmol.

const doublereal Avogadro = 6.02214129e26
 Avogadro's Number [number/kmol]. More...
 
const doublereal GasConstant = 8314.4621
 Universal Gas Constant. [J/kmol/K]. More...
 
const doublereal logGasConstant = std::log(GasConstant)
 
const doublereal OneAtm = 1.01325e5
 One atmosphere [Pa]. More...
 
const doublereal OneBar = 1.0E5
 
const doublereal GasConst_cal_mol_K = GasConstant / 4184.0
 Universal gas constant in cal/mol/K. More...
 
const doublereal Boltzmann = GasConstant / Avogadro
 Boltzmann's constant [J/K]. More...
 
const doublereal Planck = 6.62607009e-34
 Planck's constant. [J-s]. More...
 
const doublereal Planck_bar = Planck / (2 * Pi)
 
const doublereal logBoltz_Planck = std::log(Boltzmann / Planck)
 log(k/h) More...
 
const doublereal StefanBoltz = 5.670373e-8
 Stefan-Boltzmann constant. More...
 

Electron Properties

const doublereal ElectronCharge = 1.602176565e-19
 
const doublereal ElectronMass = 9.10938291e-31
 
const doublereal Faraday = ElectronCharge * Avogadro
 

Electromagnetism

Cantera uses the MKS unit system.

const doublereal lightSpeed = 299792458.0
 Speed of Light (m/s). More...
 
const doublereal permeability_0 = 4.0e-7*Pi
 Permeability of free space \( \mu_0 \) in N/A^2. More...
 
const doublereal epsilon_0 = 1.0 / (lightSpeed*lightSpeed*permeability_0)
 Permittivity of free space \( \epsilon_0 \) in F/m. More...
 

Detailed Description

All physical constants are stored here.

Cantera uses the MKS system of units. The unit for moles is defined to be the kmol. All values of physical constants are consistent with the 2010 CODATA recommendations.

Variable Documentation

◆ Pi

const doublereal Pi = 3.14159265358979323846

Pi.

Definition at line 51 of file ct_defs.h.

Referenced by InterfaceKinetics::buildSurfaceArrhenius(), IonGasTransport::fitDiffCoeffs(), GasTransport::fitDiffCoeffs(), GasTransport::fitProperties(), Cantera::Frot(), GasTransport::makePolarCorrections(), GasTransport::setupCollisionParameters(), IonGasTransport::setupN64(), SimpleTransport::updateDiff_T(), and DustyGasTransport::updateKnudsenDiffCoeffs().

◆ Avogadro

const doublereal Avogadro = 6.02214129e26

Avogadro's Number [number/kmol].

Definition at line 61 of file ct_defs.h.

Referenced by GasTransport::fitProperties(), IonFlow::ND(), GasTransport::setupCollisionParameters(), and Unit::Unit().

◆ GasConstant

const doublereal GasConstant = 8314.4621

Universal Gas Constant. [J/kmol/K].

Definition at line 64 of file ct_defs.h.

Referenced by SurfPhase::_updateThermo(), vcs_VolPhase::_updateVolPM(), Reactor::addSensitivitySpeciesEnthalpy(), InterfaceKinetics::buildSurfaceArrhenius(), MixtureFugacityTP::calculatePsat(), MultiPhaseEquil::computeReactionSteps(), ConstCpPoly::ConstCpPoly(), ConstDensityThermo::cp_mole(), RedlichKwongMFTP::cp_mole(), IdealSolnGasVPSS::cp_mole(), SingleSpeciesTP::cp_mole(), IdealSolidSolnPhase::cp_mole(), LatticePhase::cp_mole(), IdealGasPhase::cp_mole(), PDSS_Nondimensional::cp_mole(), PDSS_Molar::cp_R(), PDSS::cpDelp_mole(), RedlichKwongMFTP::critCompressibility(), PDSS_IdealGas::cv_mole(), RedlichKwongMFTP::cv_mole(), IdealSolnGasVPSS::cv_mole(), RedlichKisterVPSSTP::cv_mole(), MixedSolventElectrolyte::cv_mole(), MargulesVPSSTP::cv_mole(), PhaseCombo_Interaction::cv_mole(), IdealGasPhase::cv_mole(), PDSS_IonsFromNeutral::density(), MixtureFugacityTP::densityCalc(), RedlichKwongMFTP::dpdVCalc(), PDSS_Nondimensional::enthalpy_mole(), PDSS_Molar::enthalpy_RT(), PDSS::enthalpyDelp_mole(), ConstDensityThermo::entropy_mole(), RedlichKwongMFTP::entropy_mole(), IdealSolnGasVPSS::entropy_mole(), IdealSolidSolnPhase::entropy_mole(), SurfPhase::entropy_mole(), LatticePhase::entropy_mole(), IdealGasPhase::entropy_mole(), PDSS_Nondimensional::entropy_mole(), PDSS_Molar::entropy_R(), PDSS::entropyDelp_mole(), ChemEquil::estimateElementPotentials(), StFlow::evalResidual(), GasTransport::fitProperties(), IdealSolidSolnPhase::getChemPotentials_RT(), WaterSSTP::getCp_R(), SurfPhase::getCp_R(), BulkKinetics::getDeltaSSEntropy(), InterfaceKinetics::getDeltaSSEntropy(), PureFluidPhase::getEntropy_R(), WaterSSTP::getEntropy_R(), SurfPhase::getEntropy_R(), AqueousKinetics::getEquilibriumConstants(), SimpleTransport::getFluidMobilities(), LiquidTransport::getFluidMobilities(), WaterSSTP::getGibbs_RT(), WaterSSTP::getIntEnergy_RT(), LTI_StefanMaxwell_PPN::getMatrixTransProp(), DustyGasTransport::getMolarFluxes(), IdealSolnGasVPSS::getPartialMolarCp(), RedlichKwongMFTP::getPartialMolarCp(), SingleSpeciesTP::getPartialMolarCp(), SurfPhase::getPartialMolarCp(), IdealMolalSoln::getPartialMolarCp(), IdealSolidSolnPhase::getPartialMolarCp(), LatticePhase::getPartialMolarCp(), IdealGasPhase::getPartialMolarCp(), DebyeHuckel::getPartialMolarCp(), HMWSoln::getPartialMolarCp(), IdealSolnGasVPSS::getPartialMolarEntropies(), RedlichKwongMFTP::getPartialMolarEntropies(), SingleSpeciesTP::getPartialMolarEntropies(), IonsFromNeutralVPSSTP::getPartialMolarEntropies(), SurfPhase::getPartialMolarEntropies(), IdealMolalSoln::getPartialMolarEntropies(), IdealSolidSolnPhase::getPartialMolarEntropies(), LatticePhase::getPartialMolarEntropies(), IdealGasPhase::getPartialMolarEntropies(), DebyeHuckel::getPartialMolarEntropies(), HMWSoln::getPartialMolarEntropies(), MultiTransport::getThermalDiffCoeffs(), PDSS_Nondimensional::gibbs_mole(), PDSS_Molar::gibbs_RT(), PDSS::gibbsDelp_mole(), GasKinetics::init(), LiquidTranInteraction::init(), PDSS_ConstVol::intEnergy_mole(), PDSS_IdealGas::intEnergy_mole(), PDSS_IonsFromNeutral::intEnergy_mole(), PDSS_SSVol::intEnergy_mole(), ConstCpPoly::modifyOneHf298(), NasaPoly1::modifyOneHf298(), ShomatePoly::modifyOneHf298(), RedlichKwongMFTP::NicholsSolve(), IdealGasPhase::pressure(), MixTransport::pressure_ig(), RedlichKwongMFTP::pressureCalc(), RedlichKwongMFTP::pressureDerivatives(), Mu0Poly::processCoeffs(), ConstCpPoly::reportHf298(), NasaPoly1::reportHf298(), ShomatePoly::reportHf298(), ThermoPhase::RT(), MargulesVPSSTP::s_update_dlnActCoeff_dT(), PDSS_ConstVol::setPressure(), PDSS_IdealGas::setPressure(), IdealGasPhase::setState_RP(), PDSS_IdealGas::setState_TR(), PDSS_ConstVol::setTemperature(), PDSS_IdealGas::setTemperature(), ShomatePoly::ShomatePoly(), HighPressureGasTransport::thermalConductivity(), Unit::Unit(), SimpleTransport::updateDiff_T(), AqueousKinetics::updateKc(), DustyGasTransport::updateKnudsenDiffCoeffs(), MultiTransport::updateThermal_T(), VCS_SOLVE::vcs_evalSS_TP(), VCS_SOLVE::vcs_prob_specifyFully(), VCS_SOLVE::vcs_report(), and VCS_SOLVE::vcs_TP().

◆ OneAtm

const doublereal OneAtm = 1.01325e5

One atmosphere [Pa].

Definition at line 69 of file ct_defs.h.

Referenced by StFlow::evalResidual(), FixedChemPotSSTP::FixedChemPotSSTP(), PDSS_HKFT::initThermo(), Cantera::newAdsorbateThermoFromXML(), Cantera::newConstCpThermoFromXML(), Cantera::newNasa9ThermoFromXML(), Cantera::newNasaThermoFromXML(), Cantera::newShomateThermoFromXML(), PDSS_HKFT::PDSS_HKFT(), PDSS_Water::pref_safe(), and PDSS_HKFT::setParametersFromXML().

◆ GasConst_cal_mol_K

const doublereal GasConst_cal_mol_K = GasConstant / 4184.0

Universal gas constant in cal/mol/K.

Definition at line 73 of file ct_defs.h.

◆ Boltzmann

const doublereal Boltzmann = GasConstant / Avogadro

Boltzmann's constant [J/K].

Definition at line 76 of file ct_defs.h.

Referenced by IonGasTransport::fitDiffCoeffs(), GasTransport::fitDiffCoeffs(), GasTransport::fitProperties(), GasTransport::getBinDiffCorrection(), SolidTransport::getMobilities(), MixTransport::getMobilities(), SimpleTransport::getMobilities(), LiquidTransport::getMobilities(), SimpleTransport::getSpeciesFluxesExt(), MultiTransport::init(), GasTransportData::setCustomaryUnits(), and GasTransport::setupCollisionIntegral().

◆ Planck

const doublereal Planck = 6.62607009e-34

Planck's constant. [J-s].

Definition at line 79 of file ct_defs.h.

◆ logBoltz_Planck

const doublereal logBoltz_Planck = std::log(Boltzmann / Planck)

log(k/h)

Definition at line 83 of file ct_defs.h.

◆ StefanBoltz

const doublereal StefanBoltz = 5.670373e-8

Stefan-Boltzmann constant.

Definition at line 85 of file ct_defs.h.

Referenced by StFlow::evalResidual(), and Wall::Q().

◆ lightSpeed

const doublereal lightSpeed = 299792458.0

Speed of Light (m/s).

Definition at line 100 of file ct_defs.h.

Referenced by GasTransportData::setCustomaryUnits().

◆ permeability_0

const doublereal permeability_0 = 4.0e-7*Pi

Permeability of free space \( \mu_0 \) in N/A^2.

Definition at line 103 of file ct_defs.h.

◆ epsilon_0

const doublereal epsilon_0 = 1.0 / (lightSpeed*lightSpeed*permeability_0)

Permittivity of free space \( \epsilon_0 \) in F/m.

Definition at line 106 of file ct_defs.h.

Referenced by IonFlow::evalResidual(), GasTransport::makePolarCorrections(), GasTransport::setupCollisionParameters(), and IonGasTransport::setupN64().

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