MPBAM	metal powder bed additive manufacturing
PBF	powder bed fusion
SLM	selective laser melting
SLS	selective laser sintering
DMD	direct metal deposition
FEM	finite element method
IR	infrared
$u$	internal energy
$H$	enthalpy
$\mathsf{\rho }$	density
${\mathsf{\rho }}_e$	effective density
$k$	thermal conductivity
$k_e$	effective thermal conductivity
$c_p$	specific heat
$\kappa$	thermal diffusivity
$\dot{q}$	a volumetric heat source
$Q$	amount of heat
$H_f$	latent heat
$P$	laser power
$\eta$	absorption
$V$	laser heat source moving velocity
$h$	hatch space
$w$	track length
$x,y,z$	coordinate
$T, T_0,T_m$	temperature, room temperature, material melting temperature
$\Delta T$	temperature change due to the consideration of latent heat
$\theta$	temperature change due to the moving laser heat source
$t$	time
$\xi$	time related integration variable
$\tau ,\gamma ,\beta$	powder packing related coefficients
$L, D, W, Vol$	molten pool length, depth, width, volume