.ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.ddph_ph_dd

Information

Second derivatives function of density

Interface

function ddph_ph_dd
  extends Modelica.Icons.Function;
  input Units.SI.Pressure p "pressure";
  input Units.SI.SpecificEnthalpy h "specific enthalpy";
  input ThermoSysPro.Properties.WaterSteam.Common.IF97TwoPhaseAnalytic aux "auxiliary record";
  output Real ddph_ph "Second derivative of density by p at constant h";
  output Real ddph_hp "Second mixed derivative of density by p and h";
end ddph_ph_dd;