.MultiPhaseMixture.Information.UsersGuide.OverallProperties

Information

Overall Thermodymamic properties

To calculate overall properties one of following models can be used:

• Properties
• ThermoProperties
• MultiPhaseProperties

ThermoProperties is the most basic model which only calculate the most basic properties (similar to BaseProperties in Modelica.Media). Properties adds additional overall properties (an average calculation is used for properties which are not defined when multiple phases exist). The disadvantage of using Properties instead of ThermoProperties is that these extra properties may be more computational demanding, especially when several phases exists.

MultiPhaseProperties also calculate overall properties for the most basic properties. To distinguish overall from one phase properties, overall properties ends with _overall in MultiPhaseProperties.

Example: calculation of density using ThermoProperties model

To calculate properties specify 2 properties and the overall composistion according to the inputs parameter. An advantage with the model based approach is that this can be done graphically.