r_sample 0.5[inch] "Radius of the wooden sample"
rho_w_init 630[kg/m^3] "Density of wood at time 0 s"
epsilon_w_init 0.4 "Porosity of wood at time 0 s"
d_w 5e-5[m] "Pore size in wood"
d_c 1e-4[m] "Pore size in char"
Mw_N2 0.028[kg/mol] "Molar mass for nitrogen"
Mw_g 0.038[kg/mol] "Molar mass for pseudo species gas"
Mw_t 0.11[kg/mol] "Molar mass for pseudo species tar"
e 1 Emissivity
e_w 0.7 "Emissivity of wood"
e_c 0.92 "Emissivity of char"
rho_water 1000[kg/m^3] "Density of water"
k_c_across 0.071[W/m/K] "Effective thermal conductivity for char across fiber direction"
k_c_along 0.105[W/m/K] "Effective thermal conductivity for char along fiber direction"
k_w_across "rho_w_init/rho_water*(0.1941+0.01864) [W/m/K]" "Effective thermal conductivity for wood across fiber direction"
k_w_along "2.8 * k_w_across" "Effective thermal conductivity for wood along fiber direction"
k_mixture 0.0258[W/m/K] "Effective thermal conductivity for gas mixture"
viscosity 3e-5[kg/m/s] "Dynamic viscosity of gas mixture"
kappa_w_across 5e-16[m^2] "Permeability in wood across fiber direction"
kappa_w_along 5e-14[m^2] "Permeability in wood along fiber direction"
kappa_c_across 1e-13[m^2] "Permeability in char across fiber direction"
kappa_c_along 1e-12[m^2] "Permeability in char along fiber direction"