oksCorey',matData.porousMedia.gasRelPermeability)
                this.gasRelativePermeability = RelativePermeabilityBrooksCoreyGas();
            elseif strcmp('PolynomialGas',matData.porousMedia.gasRelPermeability)
                this.gasRelativePermeability = RelativePermeabilityPolynomialGas();
            elseif strcmp('UMAT',matData.porousMedia.gasRelPermeability)
                curve = matData.porousMedia.kgr_umat;
                this.gasRelativePermeability = RelativePermeabilityUMAT(curve(:,1),c