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  • Last update: 5 years ago
  • Total downloads: 24
  • Operating system: Linux, Mac OS X, Win All, BSD, Solaris
  • Publisher: Mark Mikofski
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scripts default iconIAPWS_IF97 functional form with no slip (Scripts) Publisher's description

Water and steam properties and derivatives based on the IAPWS IF97. Functional form. No slip.

Water and steam properties and derivatives based on the IAPWS IF97. Functional form. No slip.
IAPWS_IF97(FUN,IN1,IN2) is 104 functions of water properties and derivatives, based on the International Association on Properties of Water and Steam (http://www.iapws.org). Thermodynamic, hydrodynamic and non-linear modeling often requires thermodynamic derivatives, therefore IAPWS_IF97 can calculate most property derivates as functions of pressure and enthalpy, e.g.: dTdp_ph, cp_ph, dvdp_ph and dvdh_ph. Since modeling often involves multiple dimensions that are discretized or meshed to form a set of either finite-difference or finite-element equations, IAPWS_IF97 is vectorized even across regions (subcooled/compressed-liquid, saturated, superheated and supercritical).

FUN is the desired water/steam property function (see below for list) that may take 1 input, IN1, or 2 inputs, IN1 and IN2, depending on the function. The size of the return from IAPWS_IF97 is the same as the size of the inputs, which must be the same size, except if a scalar is entered for one input and the other input is a vector or matrix, then the scalar is repeated to form a vector or matrix of the same size as the other input. If a row vector is entered, it will be is transposed. FYI: nan is returned for out of range values. For ranges please see the "Revised IAPWS Industrial Formulation" here: 1997 http://www.iapws.org/relguide/IF97-Rev.pdf.

This is the functional form. I will submit a class definition soon, and a version that offers slip using Zivi's correlation (1964) for 2-phase flow.

Reference Documents:
Industrial Formulation 1997 (IF97-Rev, IAPWS-IF97), IAPWS-IF97-S01, IAPWS-IF97-S03rev, IAPWS-IF97-S04, IAPWS-IF97-S05, Revised Advisory Note No. 3 Thermodynamic Derivatives from IAPWS Formulations 2008, Release on the IAPWS Formulation 2008 for the Viscosity of Ordinary Water Substance, 2008 Revised Release on the IAPWS Formulation 1985 for the Thermal Conductivity of Ordinary Water Substance.


System Requirements:

No special requirements.
Program Release Status: New Release
Program Install Support: Install and Uninstall

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