rho_w rho_water Density, wetting fluid mu_w mu_water Dynamic viscosity, wetting fluid rho_nw rho_oil Density, non-wetting fluid mu_nw mu_oil Dynamic viscosity, non-wetting fluid alpha 3.58[1/m] Van Genuchten alpha parameter L 0.5 van Genuchten L parameter N 3.1365 van Genuchten N parameter M 1-1/N van Genuchten M parameter kap_su 952.45[mD] Permeability, upper layer theta_ru 0.0072 Residual volume fraction, upper layer sigma_ow 0.0364[H/m] Interfacial tension sigma sigma_ow/sigma_aw Ratio between interfacial tensions