Modelica.Media.Water.IF97_Utilities.BaseIF97.Transport

Information

Package description

Package contents

• 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.

Version Info and Revision history

• First implemented: October, 2002 by Hubertus Tummescheit

• Initial version: October 2002

Package Content

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

Information

Inputs

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

Outputs

Name	Description
eta	Dynamic viscosity [Pa.s]

Modelica.Media.Water.IF97_Utilities.BaseIF97.Transport.cond_dTp

Information

Inputs

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

Outputs

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

Modelica.Media.Water.IF97_Utilities.BaseIF97.Transport.surfaceTension

Information

Inputs

Name	Description
T	Temperature (K) [K]

Outputs

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