rizer::units Namespace Reference

Variables
constexpr double	e = 1.602'176'634e-19
	Elementary charge [C]. Exact (CODATA).
constexpr double	k_b = 1.380'649e-23
	Boltzmann constant [J/K]. Exact (CODATA).
constexpr double	N_a = 6.022'140'76e23
	Avogadro's number [1/mol]. Exact (CODATA).
constexpr double	c = 299'792'458.0
	Speed of light [m/s]. Exact (CODATA).
constexpr double	h = 6.626'070'15e-34
	Planck constant [J s]. Exact (CODATA).
constexpr double	m_e = 9.109'383'713'9e-31
	Electron mass [kg] (CODATA 2022).
constexpr double	M_e = m_e * N_a
	Electron molar mass [kg/mol].
constexpr double	Da = 1.660'539'068'92e-27
	Dalton / atomic mass constant [kg] (CODATA 2022).
constexpr double	epsilon_0 = 8.854'187'818'8e-12
	Vacuum permittivity [F/m] (CODATA 2022).
constexpr double	stefan_boltzmann = 5.670'374'419e-8
	Stefan-Boltzmann constant [W/(m^2 K^4)] (CODATA).
constexpr double	bohr_radius_m = 5.291'772'105'44e-11
	Bohr radius [m] (CODATA).
constexpr double	rydberg_energy_eV = 13.605'693'122'990
	Rydberg energy [eV] (CODATA).
constexpr double	pi = 3.141'592'653'589'793'238'46
	pi (matches numpy's np.pi used in units.py).
constexpr double	hbar = h / (2.0 * pi)
	Reduced Planck constant [J s].
constexpr double	R = k_b * N_a
	Ideal gas constant [J/(mol K)].
constexpr double	R_kmol = R * 1e3
	Ideal gas constant [J/(kmol K)] (matches Cantera's GasConstant).
constexpr double	m_N2 = 28.013'4 * Da
	N2 mass [kg].
constexpr double	P_1_bar = 1e5
	1 bar [Pa].
constexpr double	eV_to_K = e / k_b
	eV -> K.
constexpr double	K_to_eV = k_b / e
	K -> eV.
constexpr double	eV_to_J = e
	eV -> J.
constexpr double	J_to_eV = 1.0 / e
	J -> eV.
constexpr double	K_to_J = k_b
	K -> J.
constexpr double	J_to_K = 1.0 / k_b
	J -> K.
constexpr double	kJ_per_mol_to_J_per_particle = 1e3 / N_a
	kJ/mol -> J/particle.
constexpr double	invcm_to_joule = h * c * 100.0
	inverse cm -> J.
const double	spitzer_constant
	Spitzer conductivity constant [Ohm^-1 m^-1 K^-3/2]:

Variable Documentation

bohr_radius_m

double rizer::units::bohr_radius_m = 5.291'772'105'44e-11

constexpr

Bohr radius [m] (CODATA).

Definition at line 46 of file units.h.

c

double rizer::units::c = 299'792'458.0

constexpr

Speed of light [m/s]. Exact (CODATA).

Definition at line 32 of file units.h.

Da

double rizer::units::Da = 1.660'539'068'92e-27

constexpr

Dalton / atomic mass constant [kg] (CODATA 2022).

Definition at line 40 of file units.h.

e

double rizer::units::e = 1.602'176'634e-19

constexpr

Elementary charge [C]. Exact (CODATA).

Definition at line 26 of file units.h.

epsilon_0

double rizer::units::epsilon_0 = 8.854'187'818'8e-12

constexpr

Vacuum permittivity [F/m] (CODATA 2022).

Definition at line 42 of file units.h.

eV_to_J

double rizer::units::eV_to_J = e

constexpr

eV -> J.

Definition at line 73 of file units.h.

eV_to_K

double rizer::units::eV_to_K = e / k_b

constexpr

eV -> K.

Definition at line 69 of file units.h.

h

double rizer::units::h = 6.626'070'15e-34

constexpr

Planck constant [J s]. Exact (CODATA).

Definition at line 34 of file units.h.

hbar

double rizer::units::hbar = h / (2.0 * pi)

constexpr

Reduced Planck constant [J s].

Definition at line 53 of file units.h.

invcm_to_joule

double rizer::units::invcm_to_joule = h * c * 100.0

constexpr

inverse cm -> J.

Definition at line 83 of file units.h.

J_to_eV

double rizer::units::J_to_eV = 1.0 / e

constexpr

J -> eV.

Definition at line 75 of file units.h.

J_to_K

double rizer::units::J_to_K = 1.0 / k_b

constexpr

J -> K.

Definition at line 79 of file units.h.

k_b

double rizer::units::k_b = 1.380'649e-23

constexpr

Boltzmann constant [J/K]. Exact (CODATA).

Definition at line 28 of file units.h.

K_to_eV

double rizer::units::K_to_eV = k_b / e

constexpr

K -> eV.

Definition at line 71 of file units.h.

K_to_J

double rizer::units::K_to_J = k_b

constexpr

K -> J.

Definition at line 77 of file units.h.

kJ_per_mol_to_J_per_particle

double rizer::units::kJ_per_mol_to_J_per_particle = 1e3 / N_a

constexpr

kJ/mol -> J/particle.

Definition at line 81 of file units.h.

M_e

double rizer::units::M_e = m_e * N_a

constexpr

Electron molar mass [kg/mol].

Definition at line 38 of file units.h.

m_e

double rizer::units::m_e = 9.109'383'713'9e-31

constexpr

Electron mass [kg] (CODATA 2022).

Definition at line 36 of file units.h.

m_N2

double rizer::units::m_N2 = 28.013'4 * Da

constexpr

N2 mass [kg].

Definition at line 62 of file units.h.

N_a

double rizer::units::N_a = 6.022'140'76e23

constexpr

Avogadro's number [1/mol]. Exact (CODATA).

Definition at line 30 of file units.h.

P_1_bar

double rizer::units::P_1_bar = 1e5

constexpr

1 bar [Pa].

Definition at line 64 of file units.h.

pi

double rizer::units::pi = 3.141'592'653'589'793'238'46

constexpr

pi (matches numpy's np.pi used in units.py).

Definition at line 51 of file units.h.

R

double rizer::units::R = k_b * N_a

constexpr

Ideal gas constant [J/(mol K)].

Definition at line 58 of file units.h.

R_kmol

double rizer::units::R_kmol = R * 1e3

constexpr

Ideal gas constant [J/(kmol K)] (matches Cantera's GasConstant).

Definition at line 60 of file units.h.

rydberg_energy_eV

double rizer::units::rydberg_energy_eV = 13.605'693'122'990

constexpr

Rydberg energy [eV] (CODATA).

Definition at line 48 of file units.h.

spitzer_constant

const double rizer::units::spitzer_constant

inline

Initial value:

                                 =
std::pow(4.0 * pi * epsilon_0 / e, 2.0) * std::pow(k_b, 1.5)
/ (4.0 / 3.0 * std::sqrt(2.0 * pi * m_e)) * 1.96

Spitzer conductivity constant [Ohm^-1 m^-1 K^-3/2]:

\[ \sigma = \text{spitzer\_constant} \cdot T_e^{3/2} / \ln\Lambda. \]

Same expression as units.py (cannot be constexpr: uses pow/sqrt).

Definition at line 90 of file units.h.

stefan_boltzmann

double rizer::units::stefan_boltzmann = 5.670'374'419e-8

constexpr

Stefan-Boltzmann constant [W/(m^2 K^4)] (CODATA).

Definition at line 44 of file units.h.