.ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.thermalConductivity .ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.thermalConductivityfunction thermalConductivity = ThermoSysPro.Properties.WaterSteam.BaseIF97.Transport.cond_industrial_dT;