constants.h

// Copyright (c) "2020, by Centre Européen de Recherche et de Formation Avancée en Calcul Scientifiq
//               Developer: Mario Di Renzo
//               Affiliation: Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique
//               URL: https://cerfacs.fr
//               Citation: Di Renzo, M., Lin, F., and Urzay, J. (2020).
//                         HTR solver: An open-source exascale-oriented task-based
//                         multi-GPU high-order code for hypersonic aerothermodynamics.
//                         Computer Physics Communications 255, 107262"
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#ifndef __CONSTANTS_H__
#define __CONSTANTS_H__

//-----------------------------------------------------------------------------
// MATH CONSTANTS
//-----------------------------------------------------------------------------

#define PI    3.1415926535898

//-----------------------------------------------------------------------------
// PHYSICAL CONSTANTS
//-----------------------------------------------------------------------------

// Universal gas constant
#define RGAS  8.3144598        // [J/(mol K)]
// Avogadro number
#define Na    6.02214086e23    // [1/mol]
// Boltzmann constant
#define kb    1.38064852e-23   // [m^2 kg /( s^2 K)]
// Dielectric permittivity of the vacuum
#define eps_0 8.8541878128e-12 // [F/m] or [C/(V m)]
// Elementary electric charge
#define eCrg  1.60217662e-19   // [C]

//-----------------------------------------------------------------------------
// UNIT CONVERSION
//-----------------------------------------------------------------------------

#define ATom   1e-10            // Angstrom to meter
#define DToCm  3.33564e-30      // Debye to Coulomb meter
#define calToJ 4.184            // cal to Joule

#endif // __CONSTANTS_H__