WOLFRAM SYSTEMMODELER

FixedBoundary

Boundary source component

Wolfram Language

In[1]:=
SystemModel["Modelica.Fluid.Sources.FixedBoundary"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Model FixedBoundary defines constant values for boundary conditions:

  • Boundary pressure or boundary density.
  • Boundary temperature or boundary specific enthalpy.
  • Boundary composition (only for multi-substance or trace-substance flow).

Note, that boundary temperature, density, specific enthalpy, 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

Value: true

Type: Boolean

Description: select p or d

p

Value: Medium.p_default

Type: AbsolutePressure (Pa)

Description: Boundary pressure

d

Value: if use_T then Medium.density_pTX(Medium.p_default, Medium.T_default, Medium.X_default) else Medium.density_phX(Medium.p_default, Medium.h_default, Medium.X_default)

Type: Density (kg/m³)

Description: Boundary density

use_T

Value: true

Type: Boolean

Description: select T or h

T

Value: Medium.T_default

Type: Temperature (K)

Description: Boundary temperature

h

Value: Medium.h_default

Type: SpecificEnthalpy (J/kg)

Description: Boundary specific enthalpy

X

Value: Medium.X_default

Type: MassFraction[Medium.nX] (kg/kg)

Description: Boundary mass fractions m_i/m

C

Value: Medium.C_default

Type: ExtraProperty[Medium.nC]

Description: Boundary trace substances

Connectors (1)

ports

Type: FluidPorts_b[nPorts]

Components (2)

medium

Type: BaseProperties

Description: Medium in the source

state

Type: ThermodynamicState

Used in Examples (4)

PumpingSystem

Modelica.Fluid.Examples

Model of a pumping system for drinking water

DrumBoiler

Modelica.Fluid.Examples.DrumBoiler

Complete drum boiler model, including evaporator and supplementary components

RoomCO2

Modelica.Fluid.Examples.TraceSubstances

Demonstrates a room volume with CO2 accumulation

RoomCO2WithControls

Modelica.Fluid.Examples.TraceSubstances

Demonstrates a room volume with CO2 controls