rho_air 1[kg/m^3] "Density of air"
mu_air 1e-5[Pa*s] "Viscosity of air"
rho_resin 1250[kg/m^3] "Density of resin"
mu_resin 0.195[Pa*s] "Viscosity of resin"
epsilon_1 0.45 "Porosity of material 1"
epsilon_2 0.5 "Porosity of material 2"
epsilon_3 0.5 "Porosity of material 3"
p_in 800[kPa] "Inlet pressure"