.ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.ddph

Information

density derivative by pressure

Interface

function ddph
  extends Modelica.Icons.Function;
  input Units.SI.Pressure p "pressure";
  input Units.SI.SpecificEnthalpy h "specific enthalpy";
  input Integer phase = 0 "2 for two-phase, 1 for one-phase, 0 if not known";
  input Integer region = 0 "if 0, region is unknown, otherwise known and this input";
  output Units.SI.DerDensityByPressure ddph "density derivative by pressure";
end ddph;