$\rho$	Density (kg m−3)
$C_p$	Heat capacity (J·kg−1 K−1)
T	Temperature (K)
$\kappa$	Thermal conductivity (W m−1 K−1)
$Q_e$	Heat source (W m−3)
${\phi }_{rsa}$	Surface to ambient radiative heat flux (W m−2)
${\sigma }_s$	Stefan Boltzmann constant (5.67 × 10−8 W m−2·K−4)
$\mathsf{ϵ}$	Emissivity
Tair	Air temperature (K)
${\phi }_{csa}$	Convective heat flux (W m−2)
$h_{ia}$	Surface conductivity (W m−2 K−1)
J	Surface radiosity (W m−2)
G	Irradiation flux (W m−2)
n	Refractive index
$e_b\left(T\right)$	Surface radiation produced (W m−2)
${\mu }_r$	Complex relative permeability
${\epsilon }_r$	Complex relative permittivity
${\mu }_r^{″}$	Relative permeability imaginary part
${\epsilon }_r^{″}$	Relative permittivity imaginary part
$k_0$	The vacuum wave number (rad·m−1)
$\sigma$	The electric conductivity (S·m−1)
${\epsilon }_0$	The vacuum permittivity (8.854187817 × 10−12 F m−1)
${\mu }_0$	The vacuum permeability (1.2566370614 × 10−6 T·m/A)
j	The complex number
ω	The angular frequency (rad Hz)
$\mathit{E}$	Electric field strength (V m−1)
$\mathit{H}$	The magnetic field intensity (A m−1)