Boundary_pTBoundary with prescribed pressure, temperature, composition and trace substances |
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Defines prescribed values for boundary conditions:
- Prescribed boundary pressure.
- Prescribed boundary temperature.
- Boundary composition (only for multi-substance or trace-substance flow).
If use_p_in is false (default option), the p parameter
is used as boundary pressure, and the p_in input connector is disabled; if use_p_in is true, then the p parameter is ignored, and the value provided by the input connector is used instead.
The same thing goes for the temperature, composition and trace substances.
Note, that boundary temperature, mass fractions and trace substances have only an effect if the mass flow is from the boundary into the port. If mass is flowing from the port into the boundary, the boundary definitions, with exception of boundary pressure, do not have an effect.
Parameters (9)
| nPorts |
Value: 0 Type: Integer Description: Number of ports |
|---|---|
| use_p_in |
Value: false Type: Boolean Description: Get the pressure from the input connector |
| use_T_in |
Value: false Type: Boolean Description: Get the temperature from the input connector |
| use_X_in |
Value: false Type: Boolean Description: Get the composition from the input connector |
| use_C_in |
Value: false Type: Boolean Description: Get the trace substances from the input connector |
| p |
Value: Medium.p_default Type: AbsolutePressure (Pa) Description: Fixed value of pressure |
| T |
Value: Medium.T_default Type: Temperature (K) Description: Fixed value of temperature |
| X |
Value: Medium.X_default Type: MassFraction[Medium.nX] (kg/kg) Description: Fixed value of composition |
| C |
Value: Medium.C_default Type: ExtraProperty[Medium.nC] Description: Fixed values of trace substances |
Connectors (5)
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ports |
Type: FluidPorts_b[nPorts] |
|---|---|---|
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p_in |
Type: RealInput Description: Prescribed boundary pressure |
|
T_in |
Type: RealInput Description: Prescribed boundary temperature |
|
X_in |
Type: RealInput[Medium.nX] Description: Prescribed boundary composition |
|
C_in |
Type: RealInput[Medium.nC] Description: Prescribed boundary trace substances |
Components (1)
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medium |
Type: BaseProperties Description: Medium in the source |
|---|
Used in Examples (12)
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Modelica.Fluid.Examples.ControlledTankSystem Demonstrating the controller of a tank filling/emptying system |
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Modelica.Fluid.Examples.AST_BatchPlant.Test Tank with one time-varying top inlet mass flow rate and a bottom outlet into the ambient |
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Modelica.Fluid.Examples.AST_BatchPlant.Test Demonstrates a tank with one constant top inlet mass flow rate and a bottom outlet into the ambient |
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Modelica.Fluid.Examples.AST_BatchPlant.Test Demonstrates a tank with one constant top inlet mass flow rate and a bottom outlet into the ambient |
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Modelica.Fluid.Examples.AST_BatchPlant.Test Demonstrates a tank with one constant top inlet mass flow rate and a bottom outlet into the ambient |
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Modelica.Fluid.Examples.AST_BatchPlant.Test Demonstrates a tank with one constant top inlet mass flow rate and a bottom outlet into the ambient |
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Modelica.Fluid.Examples Multi-way connections of pipes and incompressible medium model |
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Modelica.Fluid.Examples Multi-way connections of pipes with dynamic momentum balance, pressure wave and flow reversal |
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Modelica.Fluid.Examples Comparing a circular with a non-circular pipe |
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Modelica.Fluid.Examples.HeatExchanger Simulation for the heat exchanger model |
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Modelica.Fluid.Examples Demonstrates the parameterization of a pump and a pipe for given nominal values |
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Modelica.Fluid.Examples.Explanatory Illustrating a case in which kinetic terms play a major role in the momentum balance |