.ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.dynamicViscosity .ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.dynamicViscosityfunction dynamicViscosity = ThermoSysPro.Properties.WaterSteam.BaseIF97.Transport.visc_dT;