constant.H File Reference

#include <AMReX_REAL.H>

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Namespaces
namespace	ablastr
namespace	ablastr::constant
namespace	ablastr::constant::math
namespace	ablastr::constant::SI

Variables
static constexpr amrex::Real	ablastr::constant::math::pi = 3.14159265358979323846_rt
	ratio of a circle's circumference to its diameter
static constexpr amrex::Real	ablastr::constant::math::tau = 2.0_rt * pi
	https://tauday.com/tau-manifesto
static constexpr auto	ablastr::constant::SI::c = 299'792'458._rt
	vacuum speed of light [m/s]
static constexpr auto	ablastr::constant::SI::ep0 = 8.8541878188e-12_rt
	vacuum permittivity: dielectric permittivity of vacuum [F/m]
static constexpr auto	ablastr::constant::SI::mu0 = 1.2566370612685e-06_rt
static constexpr auto	ablastr::constant::SI::q_e = 1.602176634e-19_rt
	elementary charge [C]
static constexpr auto	ablastr::constant::SI::m_e = 9.1093837139e-31_rt
	electron mass [kg]
static constexpr auto	ablastr::constant::SI::m_p = 1.67262192595e-27_rt
	proton mass [kg]
static constexpr auto	ablastr::constant::SI::m_u = 1.66053906892e-27_rt
	dalton: unified atomic mass unit [kg]
static constexpr auto	ablastr::constant::SI::hbar = 1.0545718176461565e-34_rt
	reduced Planck Constant = h / tau [J*s]
static constexpr auto	ablastr::constant::SI::alpha = 0.0072973525643330135_rt
static constexpr auto	ablastr::constant::SI::r_e = 2.8179403205e-15_rt
	classical electron radius = 1./(4*pi*ep0) * q_e*q_e/(m_e*c*c) [m]
static constexpr double	ablastr::constant::SI::xi = 1.3050122383827227e-52
	xi: nonlinearity parameter of Heisenberg-Euler effective theory = (2.*alpha*alpha*ep0*ep0*hbar*hbar*hbar)/(45.*m_e*m_e*m_e*m_e*c*c*c*c*c)
static constexpr auto	ablastr::constant::SI::xi_c2 = 1.1728865075613984e-35_rt
	xi times c2 = xi*c*c. This should be usable for single precision instead of xi; very close to smallest float32 number possible (1.2e-38)
static constexpr auto	ablastr::constant::SI::kb = 1.380649e-23_rt
	Boltzmann constant (exact) [J/K].
static constexpr auto	ablastr::constant::SI::eV = q_e
	1 eV in [J]
static constexpr auto	ablastr::constant::SI::MeV = q_e * 1e6_rt
	1 MeV in [J]
static constexpr auto	ablastr::constant::SI::eV_invc = eV / c
	1 eV/c in [kg*m/s]
static constexpr auto	ablastr::constant::SI::MeV_invc = MeV / c
	1 MeV/c in [kg*m/s]
static constexpr auto	ablastr::constant::SI::eV_invc2 = eV / (c * c)
	1 eV/c^2 in [kg]
static constexpr auto	ablastr::constant::SI::MeV_invc2 = MeV / (c * c)
	1 MeV/c^2 in [kg]