WOLFRAM SYSTEMMODELER

SimpleFriction

Simple friction model

Wolfram Language

In[1]:=
SystemModel["Modelica.Thermal.FluidHeatFlow.Interfaces.Partials.SimpleFriction"]
Out[1]:=

Information

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

Definition of relationship between pressure drop and volume flow rate:

  • -V_flowLaminar < VolumeFlow < +V_flowLaminar: laminar, i.e., linear dependency of pressure drop on volume flow.
  • -V_flowLaminar > VolumeFlow or VolumeFlow < +V_flowLaminar: turbulent, i.e., quadratic dependency of pressure drop on volume flow.

Linear and quadratic dependency are coupled smoothly at V_flowLaminar / dpLaminar. Quadratic dependency is defined by nominal volume flow and pressure drop (V_flowNominal / dpNominal). See also sketch at diagram layer.

Parameters (5)

V_flowLaminar

Value:

Type: VolumeFlowRate (m³/s)

Description: Laminar volume flow

dpLaminar

Value:

Type: Pressure (Pa)

Description: Laminar pressure drop

V_flowNominal

Value:

Type: VolumeFlowRate (m³/s)

Description: Nominal volume flow

dpNominal

Value:

Type: Pressure (Pa)

Description: Nominal pressure drop

frictionLoss

Value: 0

Type: Real

Description: Part of friction losses fed to medium

Extended by (1)

Pipe

Modelica.Thermal.FluidHeatFlow.Components

Pipe with optional heat exchange