Updated physical constants to be consistent with 2010 CODATA recommendations
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Ray Speth
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4 changed files with 42 additions and 50 deletions
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@ -53,16 +53,16 @@ namespace Cantera
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* @defgroup physConstants Physical Constants
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* %Cantera uses the MKS system of units. The unit for moles
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* is defined to be the kmol. All values of physical constants
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* are consistent with the 2006 CODATA recommendations.
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* are consistent with the 2010 CODATA recommendations.
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* @ingroup globalData
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* @{
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*/
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//! Pi
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const doublereal Pi = 3.1415926;
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const doublereal Pi = 3.14159265358979323846;
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//! sqrt(Pi)
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const doublereal SqrtPi = std::sqrt(Pi);
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/*!
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* @name Variations of the Gas Constant
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* %Cantera uses the MKS system of units. The unit for moles
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@ -70,61 +70,52 @@ const doublereal SqrtPi = std::sqrt(Pi);
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*/
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//@{
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//! Avogadro's Number
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/*!
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* Units are number/kmol
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*/
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const doublereal Avogadro = 6.02214179e26;
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//! Avogadro's Number [number/kmol]
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const doublereal Avogadro = 6.02214129e26;
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/// Universal Gas Constant. 2006 CODATA value.
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const doublereal GasConstant = 8314.47215; // J/kmol/K
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/// Universal Gas Constant. [J/kmol/K]
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const doublereal GasConstant = 8314.4621;
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const doublereal logGasConstant = 9.025752908;
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const doublereal logGasConstant = std::log(GasConstant);
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//! One atmosphere
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/*!
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* Units are Pa
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*/
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//! One atmosphere [Pa]
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const doublereal OneAtm = 1.01325e5;
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//! Universal gas constant in cal/mol/K
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const doublereal GasConst_cal_mol_K = 1.987;
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const doublereal GasConst_cal_mol_K = GasConstant / 4184.0;
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//! Boltzmann's constant
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/*!
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* Units are J/K
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*/
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//! Boltzmann's constant [J/K]
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const doublereal Boltzmann = GasConstant / Avogadro;
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/// Planck's constant. Units of J-s
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const doublereal Planck = 6.62606896e-34; // J-s
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const doublereal Planck_bar = 1.05457162853e-34; // m2-kg/s
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/// Planck's constant. [J-s]
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const doublereal Planck = 6.62607009e-34; // J-s
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const doublereal Planck_bar = Planck / (2 * Pi); // m2-kg/s
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/// log(k/h)
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const doublereal logBoltz_Planck = 23.7599032; // ln(k_B/h)
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const doublereal logBoltz_Planck = std::log(Boltzmann / Planck); // ln(k_B/h)
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/// Stefan-Boltzmann constant
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const doublereal StefanBoltz = 5.6704004e-8;
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const doublereal StefanBoltz = 5.670373e-8;
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//@}
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/// @name Electron Properties
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//@{
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const doublereal ElectronCharge = 1.60217648740e-19; // C
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const doublereal ElectronMass = 9.1093821545e-31; // kg
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const doublereal Faraday = ElectronCharge* Avogadro;
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const doublereal ElectronCharge = 1.602176565e-19; // C
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const doublereal ElectronMass = 9.10938291e-31; // kg
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const doublereal Faraday = ElectronCharge * Avogadro;
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//@}
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/// @name Electromagnetism
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/// %Cantera uses the MKS unit system.
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//@{
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/// Permittivity of free space \f$ \epsilon_0 \f$ in F/m.
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const doublereal epsilon_0 = 8.85417817e-12; // Farads/m = C^2/N/m^2
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/// Speed of Light (m/s).
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const doublereal lightSpeed = 299792458.0;
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/// Permeability of free space \f$ \mu_0 \f$ in N/A^2.
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const doublereal permeability_0 = 4.0e-7*Pi; // N/A^2
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const doublereal permeability_0 = 4.0e-7*Pi;
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/// Speed of Light (m/s).
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const doublereal lightSpeed = 1.0/std::sqrt(epsilon_0* permeability_0);
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/// Permittivity of free space \f$ \epsilon_0 \f$ in F/m.
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const doublereal epsilon_0 = 1.0 / (lightSpeed*lightSpeed*permeability_0);
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//@}
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//@}
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@ -1,3 +1,4 @@
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function [atm,r] = constants
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atm = 101325.0;
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r = 8314.0;
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r = 8314.4621;
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@ -1,3 +1,3 @@
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function r = gasconstant
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% GASCONSTANT The universal gas constant in J/kmol-K.
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r = 8314.0;
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r = 8314.4621;
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@ -11,39 +11,39 @@ import math
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OneAtm = 101325.0
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#: The ideal gas constant in J/kmo-K
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GasConstant = 8314.47215
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GasConstant = 8314.4621
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#: Avogadro's Number, /kmol
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Avogadro = 6.02214179e26
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Avogadro = 6.02214129e26
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#: The ideal gas constant in cal/mol-K
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GasConst_cal_mol_K = 1.987
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GasConst_cal_mol_K = GasConstant / 4184.0
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#: Boltzmann-s constant
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Boltzmann = GasConstant / Avogadro
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#: The Stefan-Boltzmann constant, W/m^2K^4
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StefanBoltz = 5.6704004e-8
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StefanBoltz = 5.670373e-8
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#: The charge on an electron (C)
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ElectronCharge = 1.60217648740e-19
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ElectronCharge = 1.602176565e-19
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#: The mass of an electron (kg)
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ElectronMass = 9.1093821545e-31
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ElectronMass = 9.10938291e-31
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Pi = 3.1415926
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Pi = math.pi
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#: Faraday's constant, C/kmol
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Faraday = ElectronCharge * Avogadro
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#: Planck's constant (J/s)
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Planck = 6.6262e-34
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#: Permittivity of free space
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epsilon_0 = 8.85417817e-12 ## Farads/m = C^2/N/m^2
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#: Permeability of free space :math:`\mu_0` in N/A^2.
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permeability_0 = 4.0e-7*Pi; ## N/A^2
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Planck = 6.62607009e-34
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#: Speed of Light (m/s).
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lightSpeed = 1.0/math.sqrt(epsilon_0 * permeability_0);
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lightSpeed = 299792458.0
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#: Permeability of free space :math:`\mu_0` in N/A^2.
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permeability_0 = 4.0e-7*Pi ## N/A^2
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#: Permittivity of free space
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epsilon_0 = 1.0 / (lightSpeed*lightSpeed*permeability_0) ## Farads/m = C^2/N/m^2
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