modelSimpleFriction
Simple friction model
Information
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
| Type | Name | Default | Description |
|---|---|---|---|
| Simple friction | |||
| SI.VolumeFlowRate | V_flowLaminar | Laminar volume flow | |
| SI.Pressure | dpLaminar | Laminar pressure drop | |
| SI.VolumeFlowRate | V_flowNominal | Nominal volume flow | |
| SI.Pressure | dpNominal | Nominal pressure drop | |
| Real | frictionLoss | 0 | Part of friction losses fed to medium |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Pressure | pressureDrop | ||
| SI.VolumeFlowRate | volumeFlow | ||
| SI.Power | Q_friction |