WOLFRAM SYSTEM MODELER

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] Description: Fluid connector with outlined, large icon to be used for vectors of FluidPorts (vector dimensions must be added after dragging)

ports

Type: FluidPorts_b[nPorts]

Description: Fluid connector with outlined, large icon to be used for vectors of FluidPorts (vector dimensions must be added after dragging)

Components (2)

	medium	Type: BaseProperties Description: Medium in the source
	state	Type: ThermodynamicState Description: Minimal variable set that is available as input argument to every medium function