WOLFRAM SYSTEM MODELER
s_pTX_derReturn specific entropy of moist air as a function of pressure p, temperature T and composition X (only valid for phi<1) |
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Wolfram Language
In[1]:=
SystemModel["Modelica.Media.Air.MoistAir.s_pTX_der"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Specific entropy of moist air is computed from pressure, temperature and composition with X[1] as the total water mass fraction.Syntax
ds = s_pTX_der(p, T, X, dp, dT, dX)
Inputs (6)
| p |
Type: Pressure (Pa) Description: Pressure |
|---|---|
| T |
Type: Temperature (K) Description: Temperature |
| X |
Type: MassFraction[:] Description: Mass fractions of moist air |
| dp |
Type: Real (Pa/s) Description: Derivative of pressure |
| dT |
Type: Real (K/s) Description: Derivative of temperature |
| dX |
Type: Real[nX] (1/s) Description: Derivative of mass fractions |
Outputs (1)
| ds |
Type: Real (J/(kg⋅K⋅s)) Description: Specific entropy at p, T, X |
|---|
Revisions
2012-01-12 Stefan Wischhusen: Initial Release.
2019-05-14 Stefan Wischhusen: Corrected calculation.
2019-09-10 Stefan Wischhusen: Corrected pressure influence (p < p_ref).