k_f "k_mixture + 13.5*sigma_const*T^3*d_eff/e/epsilon" "Thermal conductivity for fluid in pores"
cp_f "w_t * cp_t +w_N2 * cp_N2 + w_g * cp_g" "Specific heat capacity for fluid in pores"
cp_t "-100[J/kg/K] + 4.4[J/kg/K^2] *T-1.57e-3[J/kg/K^3] *T^2" "Specific heat capacity for tar"
cp_g "770[J/kg/K] + 0.629[J/kg/K^2] *T-1.91e-4[J/kg/K^3] *T^2" "Specific heat capacity for gas"
cp_N2 "950[J/kg/K] + 0.188[J/kg/K^2] * T" "Specific heat capacity for N2"