AN	hydroxylamine nitrate	$C_{i,s}$	$\mathrm{concentrations} \mathrm{of} \mathrm{component} i$ on the droplet surface
$Yd$	mass fraction of the droplets	$C_{i,\infty }$	$\mathrm{concentrations} \mathrm{of} \mathrm{component} i$ inside the droplet
$\overline{d}$	mean diameter	$P_t$	pressure of evaporation
$n$	propagation parameter	$x_i$	$\mathrm{volume} \mathrm{fraction} \mathrm{of} \mathrm{component} i$ in the droplet
$m_i$	$\mathrm{the} \mathrm{mass} \mathrm{of} \mathrm{component} i$ in the droplet	$d_p$	droplet diameter
$k_{c,i}$	$\mathrm{mass} \mathrm{transport} \mathrm{coefficient} \mathrm{of} \mathrm{component} i$	$k_{\infty }$	thermal conductivity of the continuous phase
$A_p$	surface area of the droplet	$c_{p\infty }$	specific heat capacity of the continuous phase
$M_{w,i}$	$\mathrm{molecular} \mathrm{weight} \mathrm{of} \mathrm{component} i$	$f$	fluid
$s$	solid	$\gamma$	porosity of porous media
$k_{f }$	Fluid-phase thermal conductivity	$k_s$	Solid-phase thermal conductivity
$h_{fs}$	thermal conductivity between fluid and solid	$A_{fs}$	Fluid–solid interfacial density
$\rho$	solid density	$h$	sensible enthalpy
$k$	solid heat transfer coefficient	$T$	solid temperature
$q^m$	volume source term	$q$	heat flow
$q_f$	heat flow of fluid	$q_s$	heat flow of solid
$I_{sp}$	specific impulse	DPM	discrete phase model
UDF	User-defined function