**Types, constants to define menu choices**

### Information

Enumerations and data types for all types of fluids

Note: Reference enthalpy might have to be extended with enthalpy of formation.

### Package Content

Name | Description |

IndependentVariables
| Enumeration defining the independent variables of a medium |

Init
| Enumeration defining initialization for fluid flow |

ReferenceEnthalpy
| Enumeration defining the reference enthalpy of a medium |

ReferenceEntropy
| Enumeration defining the reference entropy of a medium |

pd
| Enumeration defining whether p or d are known for the boundary condition |

Th
| Enumeration defining whether T or h are known as boundary condition |

### Types and constants

type IndependentVariables = enumeration(
T "Temperature",
pT "Pressure, Temperature",
ph "Pressure, Specific Enthalpy",
phX "Pressure, Specific Enthalpy, Mass Fraction",
pTX "Pressure, Temperature, Mass Fractions",
dTX "Density, Temperature, Mass Fractions")
"Enumeration defining the independent variables of a medium";

type Init = enumeration(
NoInit "NoInit (no initialization)",
InitialStates "InitialStates (initialize medium states)",
SteadyState "SteadyState (initialize in steady state)",
SteadyMass "SteadyMass (initialize density or pressure in steady state)")
"Enumeration defining initialization for fluid flow";

type ReferenceEnthalpy = enumeration(
ZeroAt0K
"The enthalpy is 0 at 0 K (default), if the enthalpy of formation is excluded",
ZeroAt25C
"The enthalpy is 0 at 25 degC, if the enthalpy of formation is excluded",
UserDefined
"The user-defined reference enthalpy is used at 293.15 K (25 degC)")
"Enumeration defining the reference enthalpy of a medium";

type ReferenceEntropy = enumeration(
ZeroAt0K "The entropy is 0 at 0 K (default)",
ZeroAt0C "The entropy is 0 at 0 degC",
UserDefined
"The user-defined reference entropy is used at 293.15 K (25 degC)")
"Enumeration defining the reference entropy of a medium";

type pd = enumeration(
default "Default (no boundary condition for p or d)",
p_known "p_known (pressure p is known)",
d_known "d_known (density d is known)")
"Enumeration defining whether p or d are known for the boundary condition";

type Th = enumeration(
default "Default (no boundary condition for T or h)",
T_known "T_known (temperature T is known)",
h_known "h_known (specific enthalpy h is known)")
"Enumeration defining whether T or h are known as boundary condition";

Automatically generated Fri Nov 12 16:31:29 2010.