phi0DD function

Second Derivative of the Ideal-Gas Part of the Dimensionless Helmholtz Energy Equation with respect to Density, Function of Density

Second Derivative of the Ideal-Gas Part of the Dimensionless Helmholtz Energy Equation with respect to Density, Function of Density

The function phi0DD(D,digits=9) returns the Second Derivative of the Ideal-gas part of the dimensionless Helmholtz Energy Equation for a given D [kg/m3].

phi0DD(D, digits = 9)

Arguments

  • D: Density [ kg m-3 ]
  • digits: Digits of results (optional)

Returns

The Second D Derivative of Ideal-gas part of the Helmholtz Energy: phi0DD and an Error Message (if an error occur: errorCodes )

Details

This function calls a Fortran DLL that solves the Helmholtz Energy Equation. in accordance with the Revised Release on the IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use (June 2014) developed by the International Association for the Properties of Water and Steam, http://www.iapws.org/relguide/IAPWS-95.html. It is valid from the triple point to the pressure of 1000 MPa and temperature of 1273.

Examples

D <- 838.025 phi_0 <- phi0DD(D) phi_0
  • Maintainer: Shawn Way
  • License: MIT + file LICENSE
  • Last published: 2023-09-11

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