.ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.ddhp_ph_dd

Information

Second derivatives of density w.r.t h and p

Interface

function ddhp_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 ddhp_hp "Second derivative of density by h at constant p";
  output Real ddhp_ph "Second mixed derivative of density by p and h";
end ddhp_ph_dd;