Cantera physical constants

ct_defs.h

#define _USE_MATH_DEFINES
#include <cmath>

/*!
 * All physical constants are stored here.
 *
 * @defgroup physConstants Physical Constants
 * %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.
 * @ingroup globalData
 * @{
 */
//! Pi
const doublereal Pi = M_PI;
//! sqrt(Pi)
const doublereal SqrtPi = std::sqrt(Pi);

//! Avogadro's Number
/*!
 *  Units are number/kmol
 */
const doublereal Avogadro = 6.02214129e26;

/// Universal Gas Constant. 2006 CODATA value.
const doublereal GasConstant = 8314.4621; // J/kmol/K

const doublereal logGasConstant = std::log(GasConstant);

//! One atmosphere
/*!
 *  Units are Pa
 */
const doublereal OneAtm = 1.01325e5;

//! Universal gas constant in cal/mol/K
const doublereal GasConst_cal_mol_K = GasConstant / 4184.0;

//! Boltzmann's constant
/*!
 *  Units are J/K
 */
const doublereal Boltzmann = GasConstant / Avogadro;

/// Planck's constant. Units of J-s  6.62607009e-34;
const doublereal Planck = 6.62607009e-34; // J-s
const doublereal Planck_bar = Planck / (2 * Pi); // m2-kg/s

/// log(k/h)
const doublereal logBoltz_Planck = std::log(Boltzmann / Planck); // ln(k_B/h)
/// Stefan-Boltzmann constant
const doublereal StefanBoltz = 5.670373e-8;

/// @name Electron Properties
//@{
const doublereal ElectronCharge = 1.602176565e-19; // C
const doublereal ElectronMass = 9.10938291e-31; // kg
const doublereal Faraday = ElectronCharge * Avogadro;
//@}

/// @name Electromagnetism
/// %Cantera uses the MKS unit system.
//@{

/// Speed of Light (m/s).
const doublereal lightSpeed = 299792458.0;

/// Permeability of free space \f$ \mu_0 \f$ in N/A^2.
const doublereal permeability_0 = 4.0e-7*Pi; // N/A^2

/// Permittivity of free space \f$ \epsilon_0 \f$ in F/m.
const doublereal epsilon_0 = 1.0 / (lightSpeed*lightSpeed*permeability_0); // Farads/m = C^2/N/m^2