169 lines
4.8 KiB
C++
169 lines
4.8 KiB
C++
/**
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* @file ct_defs.h
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* This file contains definitions of terms that are used in internal
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* routines and are unlikely to need modifying (text for module physConstants (see \ref physConstants) is found here).
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* This file is included
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* in every file that is in the Cantera Namespace.
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*
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* All physical constants are stored here.
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* The module physConstants is defined here.
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*/
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// This file is part of Cantera. See License.txt in the top-level directory or
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// at http://www.cantera.org/license.txt for license and copyright information.
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#ifndef CT_DEFS_H
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#define CT_DEFS_H
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#include "config.h"
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#include <cmath>
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// STL includes
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#include <cstdlib>
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#include <vector>
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#include <map>
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#include <string>
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#include <algorithm>
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#include <memory>
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/**
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* Namespace for the Cantera kernel.
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*/
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namespace Cantera
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{
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using std::shared_ptr;
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using std::make_shared;
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/*!
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* All physical constants are stored here.
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*
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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 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 = 3.14159265358979323846;
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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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* is defined to be the kmol.
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*/
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//@{
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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. [J/kmol/K]
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const doublereal GasConstant = 8314.4621;
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const doublereal logGasConstant = std::log(GasConstant);
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//! One atmosphere [Pa]
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const doublereal OneAtm = 1.01325e5;
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const doublereal OneBar = 1.0E5;
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//! Universal gas constant in cal/mol/K
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const doublereal GasConst_cal_mol_K = GasConstant / 4184.0;
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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. [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 = std::log(Boltzmann / Planck); // ln(k_B/h)
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/// Stefan-Boltzmann constant
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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 = 1.602176565e-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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/// 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;
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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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/*!
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* @name Thermodynamic Equilibrium Constraints
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* Integer numbers representing pairs of thermodynamic variables
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* which are held constant during equilibration.
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*/
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//@{
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const int TV = 100, HP = 101, SP = 102, PV = 103, TP = 104, UV = 105,
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ST = 106, SV = 107, UP = 108, VH = 109, TH = 110, SH = 111,
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PX = 112, TX = 113;
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const int VT = -100, PH = -101, PS = -102, VP = -103, PT = -104,
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VU = -105, TS = -106, VS = -107, PU = -108, HV = -109,
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HT = -110, HS = -111, XP = -112, XT = -113;
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//@}
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//! smallest number to compare to zero.
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const doublereal SmallNumber = 1.e-300;
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//! largest number to compare to inf.
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const doublereal BigNumber = 1.e300;
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//! largest x such that exp(x) is valid
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const doublereal MaxExp = 690.775527898;
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//! Fairly random number to be used to initialize variables against
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//! to see if they are subsequently defined.
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const doublereal Undef = -999.1234;
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//! Small number to compare differences of mole fractions against.
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/*!
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* This number is used for the interconversion of mole fraction and mass
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* fraction quantities when the molecular weight of a species is zero. It's also
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* used for the matrix inversion of transport properties when mole fractions
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* must be positive.
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*/
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const doublereal Tiny = 1.e-20;
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//! Map connecting a string name with a double.
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/*!
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* This is used mostly to assign concentrations and mole fractions to species.
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*/
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typedef std::map<std::string, doublereal> compositionMap;
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//! Map from string names to doubles. Used for defining species mole/mass
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//! fractions, elemental compositions, and reaction stoichiometries.
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typedef std::map<std::string, doublereal> Composition;
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//! Turn on the use of stl vectors for the basic array type within cantera
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//! Vector of doubles.
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typedef std::vector<double> vector_fp;
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//! Vector of ints
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typedef std::vector<int> vector_int;
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//! A grouplist is a vector of groups of species
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typedef std::vector<std::vector<size_t> > grouplist_t;
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//! index returned by functions to indicate "no position"
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const size_t npos = static_cast<size_t>(-1);
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} // namespace
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#endif
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