Modelica.Media.Water.IF97_Utilities.BaseIF97.Transport

Transport properties for water according to IAPWS/IF97

Function visc_dTp implements a function to compute the industrial formulation of the dynamic viscosity of water as a function of density and temperature. The details are described in the document visc.pdf.
Function cond_dTp implements a function to compute the industrial formulation of the thermal conductivity of water as a function of density, temperature and pressure. Important note: Obviously only two of the three inputs are really needed, but using three inputs speeds up the computation and the three variables are known in most models anyways. The inputs d,T and p have to be consistent. The details are described in the document surf.pdf.
Function surfaceTension implements a function to compute the surface tension between vapour and liquid water as a function of temperature. The details are described in the document thcond.pdf.

Authors: Hubertus Tummescheit and Jonas Eborn
Modelon AB
Ideon Science Park
SE-22370 Lund, Sweden
email: hubertus@modelon.se

Extends from Modelica.Icons.FunctionsPackage (Icon for packages containing functions).

Name	Description
visc_dTp	Dynamic viscosity eta(d,T,p), industrial formulation
cond_dTp	Thermal conductivity lam(d,T,p) (industrial use version) only in one-phase region
surfaceTension	Surface tension in region 4 between steam and water

Modelica.Media.Water.IF97_Utilities.BaseIF97.Transport.visc_dTp

Dynamic viscosity eta(d,T,p), industrial formulation

Extends from Modelica.Icons.Function (Icon for functions).

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
p	Pressure (only needed for region of validity) [Pa]
phase	2 for two-phase, 1 for one-phase, 0 if not known (unused)
checkLimits	Check if inputs d,T,P are in region of validity

Name	Description
eta	Dynamic viscosity [Pa.s]

Thermal conductivity lam(d,T,p) (industrial use version) only in one-phase region

Extends from Modelica.Icons.Function (Icon for functions).

Name	Description
d	Density [kg/m3]
T	Temperature (K) [K]
p	Pressure [Pa]
phase	2 for two-phase, 1 for one-phase, 0 if not known
industrialMethod	If true, the industrial method is used, otherwise the scientific one
checkLimits	Check if inputs d,T,P are in region of validity

Name	Description
lambda	Thermal conductivity [W/(m.K)]

Surface tension in region 4 between steam and water

Extends from Modelica.Icons.Function (Icon for functions).

Name	Description
T	Temperature (K) [K]

Name	Description
sigma	Surface tension in SI units [N/m]

Automatically generated Thu Oct 1 16:08:13 2020.