partial function isothermalCompressibility_psxi extends TILMedia.BaseClasses.PartialVLEFluidFunction; input TILMedia.VLEFluidTypes.BaseVLEFluid vleFluidType "VLEFluid type" annotation( choicesAllMatching = true); input SI.AbsolutePressure p "Pressure"; input SI.SpecificEntropy s "Specific entropy"; input SI.MassFraction[:] xi = TILMedia.Internals.massFraction_mixingRatio(vleFluidType.mixingRatio_propertyCalculation) "Mass fractions of the first nc-1 components"; output SI.Compressibility kappa "Isothermal compressibility"; end isothermalCompressibility_psxi;