T_amb 283[K] "Ambient temperature"
kappa_axial 3e-8[m^2] "Permeability of monoliths, axial direction"
kappa_radial 3e-12[m^2] "Permeability of monoliths, radial direction"
por 0.75 "Gas phase volume fraction of monolith"
ks_radial 0.65[W/m/K] "Solid phase thermal conductivity, radial direction"
ks_axial 1.25[W/m/K] "Solid phase thermal conductivity, axial direction"
h_conv 10[W/(m^2*K)] "Heat transfer coefficient"