.ThermoSysPro.Properties.WaterSteam.IF97_Utilities.AnalyticDerivatives.rho_ph_dd

Information

## Copyright © EDF 2002 - 2025

## ThermoSysPro Version 4.2

        

Interface

function rho_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";
  input Real p_d "derivative of pressure";
  input Real h_d "derivative of specific enthalpy";
  input Real p_dd "second derivative of pressure";
  input Real h_dd "second derivative of specific enthalpy";
  output Real rho_dd "Second derivative of density";
end rho_ph_dd;