.ThermoSysPro.Properties.Fluid.derDynamicViscosity_derrho_derT .ThermoSysPro.Properties.Fluid.derDynamicViscosity_derrho_derTfunction derDynamicViscosity_derrho_derT input Units.SI.Density rho "Density"; input Units.SI.Temperature T "Temperature"; input Integer fluid "<html>Fluid number: <br>1 - Water/Steam <br>7 - WaterSteamSimple </html>"; input Real der_rho "Density time derivative"; input Real der_T "Temperature time derivative"; output Real der_mu "Dynamic Viscosity time derivative"; end derDynamicViscosity_derrho_derT;