Program Listing for File Constants.h

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//                                                                                  //
//  Originally developed by D. Pizzocri & T. Barani                                 //
//                                                                                  //
//  Version: 2.2.1                                                                  //
//  Year: 2026                                                                      //
//  Authors: D. Pizzocri, G. Zullo.                                                 //
//                                                                                  //

#ifndef CONSTANTS_H
#define CONSTANTS_H

const double boltzmann_constant    = 1.380651e-23;   // (J/K)
const double boltzmann_constant_eV = 8.62e-5;        // (eV/K)
const double avogadro_number       = 6.02214076e23;  // (at/mol)
const double molar_mass_Oxygen     = 15.999;         // g/mol
const double molar_mass_Chromium   = 51.9961;        // g/mol
const double calorie               = 4.186;          // J
const double gas_constant          = 8.3143;         // J/(mol K)

// Blackburn (1973) correlation for the equilibrium constant of UO2 oxidation,
// ln(K) = 2 ln(x(x+2)/(1-x)) + 108 x^2 - blackburn_enthalpy/T + blackburn_entropy.
// Used in Solver::NewtonBlackburn and StoichiometryDeviation.
const double blackburn_enthalpy = 32700.0;  // (K)
const double blackburn_entropy  = 9.92;     // (/)

#endif